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Oasis Plumbing, Heating & Cooling Offers Seasonal Maintenance Plans

Air Conditioning Maintenance in Northlake, IL

Keeping your air conditioning system running at peak performance requires more than just turning it on when summer arrives. At Oasis Plumbing, Heating & Cooling, we have been serving our customers in Chicago and the Northern Suburbs for over 20 years, and one of the most important lessons we have learned in that time is that routine AC maintenance prevents the vast majority of costly breakdowns. For homeowners and business owners in Northlake, IL, investing in regular AC maintenance is one of the smartest decisions you can make for your comfort, your budget, and the longevity of your equipment.

Since 1997, we have delivered quality customer service, reliability, and expertise in heating, cooling, and ventilation to residential and commercial clients throughout the region. Our highly trained technicians and responsive support staff offer customized solutions to fit your budget, and air conditioning maintenance is at the core of what we do. Northlake’s humid summers put significant strain on cooling systems, and without proper care, even the best equipment can lose efficiency and develop problems that shorten its operational life.

Why Air Conditioning Maintenance Matters

According to the U.S. Department of Energy, regular maintenance can improve your air conditioning system’s efficiency by up to 15 percent compared to a neglected unit. When you consider that cooling costs account for a significant portion of summer energy bills in the Midwest, that efficiency gain translates into real savings month after month. A poorly maintained system has to work harder to produce the same cooling output, which increases energy consumption and accelerates wear on critical components like compressors, fan motors, and capacitors.

Beyond energy efficiency, routine maintenance directly impacts indoor air quality. Dirty evaporator coils, clogged filters, and contaminated drain lines can circulate dust, allergens, mold spores, and bacteria throughout your home or business. For families with young children, elderly residents, or anyone with respiratory sensitivities in Northlake, maintaining clean air is not a luxury but a necessity. Our maintenance visits address all of these concerns systematically, ensuring your system delivers both comfort and healthy air.

Our Comprehensive Maintenance Process

When our technicians arrive at your Northlake property for an AC maintenance appointment, we follow a thorough inspection and service protocol that covers every major component of your cooling system. This is not a quick visual check. We perform detailed diagnostics that give us a complete picture of your system’s health, allowing us to identify small issues before they become expensive repairs.

Our standard maintenance visit includes the following steps:

  1. Thermostat calibration and testing to verify accurate temperature readings and proper communication with the system
  2. Air filter inspection and replacement to ensure unrestricted airflow and optimal indoor air quality
  3. Evaporator and condenser coil cleaning to remove buildup that reduces heat transfer efficiency
  4. Condensate drain line clearing to prevent water damage, mold growth, and humidity problems
  5. Electrical connection inspection and tightening to reduce the risk of component failure or safety hazards
  6. Refrigerant level measurement to confirm the system is charged to manufacturer specifications
  7. Blower motor and fan blade assessment to check for balance, lubrication needs, and proper operation
  8. Overall system performance evaluation including temperature differential testing across supply and return vents

Each of these steps plays a critical role in keeping your system running efficiently and reliably. For example, even a thin layer of dirt on evaporator coils can reduce heat absorption significantly, forcing the compressor to run longer cycles. By cleaning these coils during maintenance, we restore your system’s ability to cool effectively without overworking itself.

Residential and Commercial Applications in Northlake

Northlake is home to a diverse mix of single-family homes, multi-unit residential properties, and commercial establishments. Each type of property presents unique maintenance challenges. A single-family home with a split system requires different attention than a commercial building running a rooftop package unit or a multi-zone ductless system. Our technicians are trained to work on all major brands and system types, bringing the right expertise to every job.

For residential customers, we often see systems that were installed years ago and have never received professional maintenance. These units may still be running, but they are typically consuming far more energy than necessary and are at high risk for sudden failure during the hottest days of summer. Our maintenance service brings these systems back to optimal performance and helps homeowners plan for future needs, whether that means continued maintenance or eventually considering an upgrade.

Commercial properties in Northlake face their own set of demands. Restaurants, retail stores, and office spaces depend on consistent cooling not only for occupant comfort but also for protecting inventory, equipment, and productivity. A system failure during business hours can mean lost revenue, uncomfortable customers, and potential damage to perishable goods. Scheduled maintenance minimizes this risk and keeps businesses running smoothly throughout the cooling season.

Seasonal Timing and Frequency Recommendations

We recommend scheduling your air conditioning maintenance in early to mid-spring, before the summer cooling season begins in earnest. This timing allows our team to identify and address any issues while demand for emergency AC repair is still low, meaning faster scheduling and less chance of experiencing a breakdown when you need your system most. Industry best practices call for at least one professional maintenance visit per year for standard residential systems, while commercial systems and older equipment may benefit from biannual service.

The benefits of proper timing extend beyond convenience. When systems are inspected before heavy use begins, refrigerant leaks can be detected and repaired before they cause compressor damage. Worn capacitors can be replaced before they fail and leave you without cooling on a ninety-degree day. Addressing these issues proactively is always more affordable and less disruptive than responding to an emergency.

Industry Trends and the Future of AC Maintenance

The HVAC industry is evolving rapidly, and maintenance practices are advancing alongside new technologies. Modern air conditioning systems increasingly feature smart diagnostics, variable-speed compressors, and connected thermostats that can alert homeowners and technicians to potential issues in real time. As your reliable HVAC team, we stay current with these developments to provide the most effective maintenance possible for both newer high-efficiency systems and legacy equipment.

Another important trend is the ongoing transition to environmentally friendlier refrigerants. The phasedown of R-410A in favor of lower global warming potential alternatives like R-32 and R-454B means that proper refrigerant handling during maintenance is more important than ever. Our technicians follow all EPA guidelines and manufacturer protocols to ensure your system operates safely and in compliance with current regulations.

  • Smart system monitoring allows for predictive maintenance that catches problems before they cause failures
  • High-efficiency equipment requires precise calibration during maintenance to deliver rated performance
  • Updated refrigerant standards demand trained technicians who understand proper handling and charging procedures

For property owners in Northlake, IL, air conditioning maintenance is not an optional expense but a wise investment in comfort, efficiency, and equipment longevity. At Oasis Plumbing, Heating & Cooling, we bring decades of experience and a genuine commitment to every maintenance visit, ensuring your system is ready to perform when you need it most. Contact us to schedule your next appointment and experience the difference that professional, thorough maintenance makes.

Air Conditioning Maintenance in Northlake, IL

Air Conditioning Maintenance in Northlake, IL

Air Conditioning Maintenance ∴ Northlake, IL

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Featured Five-Star
Customer Reviews

Danny and the folks at Oasis got us a great deal on a new furnace and AC. The install took about 4 hours, and they were also super responsive throughout the process. It was about as good of an experience I’ve had with an HVAC company. I’d highly recommend!

Brian C.

I called Oasis this morning because my furnace was not working. Within 20 minutes their technician, Danny, arrived. Danny was able to assess the situation, provide an immediate fix, and even commit to returning Monday morning to provide additional services needed. Danny was friendly, informative, professional and FAST! I am thankful I called Oasis for my immediate heating needs and that Danny was the technician who arrived. Top notch service! Highly recommend.

Megan R.

The folks with Oasis showed up right on time and replaced my entire furnace and condenser in about 4.5 hours. I had just redone my laundry room where the furnace is and they took great care not to damage anything. Overall very happy with the service and very happy with how respectful the installers were.

Josh D.

I have been using Oasis since 2019. They are reliable, efficient, and their prices are reasonable. The customer service is amazing. Every tech I’ve had come out is knowledgeable, friendly, and professional. The owner, Mike, is hands on and works with you every step of the way. Highly recommend Oasis.
Services include: furnace and AC replacement; annual maintenance.

Nicole U.

Oasis has always been great to work with and their staff are quick and efficient if issues arise. When our air conditioning broke down during the heat of the summer, they provided a quick replacement at a competitive price. Their staff are always extremely kind, respectful, and knowledgeable.

Sam C.

I had a great experience with Oasis. Our furnace had issues on Thursday night and Oasis came at 7am the next morning, and we found out we needed a new one. They provided all the necessary information to our condo building so we could get an emergency replacement on Saturday morning. Within 36 hours we had a brand new furnace and the installation team did a great job communicating on their work and how to use the furnace. The owner, Mike, and his team are great and I really appreciated the attention they gave to this matter. I would highly recommend and will only go to them in the future.

Shane H.

Oasis is great! My furnace is almost 30 years old and for a reasonable price they were able to do the repairs. First Danny came to evaluate. He showed me what was wrong. They had to order the necessary parts to fix it. Today Hani and Fernando came to do the repair. They were efficient and courteous. I will definitely use Oasis in the future.

Emily H.

Oasis was incredibly responsive and efficient! My call to them on a Friday night during a cold spell was returned within 10 minutes and he scheduled a tech to come to my home at 7 the following morning. At 7 the tech was there, examined my furnace confirming that a new motor was necessary. He searched for the part, sent a quote and returned with the motor by noon the same day to install it. You can’t beat that!!! I will be using Oasis for all my future furnace and A/C needs.

Gayle V.
Becky Watson
22 hours ago
Our technician was great. Knowledgeable, and made sure all our questions were answered.
Taylor McNulty
2 days ago
Joseph, Mark, and Vaja did a great job relocating our AC unit to our roof.
Response from the owner:Thank you, Taylor! We're glad to hear that Joseph, Mark, and Vaja provided great service with your AC unit relocation. We appreciate your feedback!
vandelisle
2 days ago
Our third time using Oasis and I could not be happier. GREAT service and reasonably priced. The technician, Naem, was friendly, very professional and helpful. So happy I found Oasis! HIGHLY RECOMMENDED!
Response from the owner:Thank you, Vandelisle, for your wonderful feedback! We're so glad to hear that you had a great experience with Joseph and appreciate your recommendation. Your satisfaction means a lot to us!
Chris and Steve were great. Fit me in same day for assessment and scheduled the follow up asap. Very helpful and reliable work. Highly recommend.
Response from the owner:Thank you, Alexandra! We're glad Chris and Steve were able to assist you promptly and that you found their work helpful and reliable. Your recommendation means a lot to us!
Luke Kinney
3 days ago
Oasis is a great company with great staff. They are American Standard / Trane authorized dealer experts. Joseph, Chris, Michael and Natalia helped me and were very thorough and communicative and gave me top recommendations for my specific unit and situation.

I had a furnace installed by another company and the process was an absolute nightmare. Installation had several errors and issues that my previous company would not address. Oasis identified those problems and rectified all of them. They were able to explain how the system works to me and provide best steps forward.

I will only be using Oasis going forward. Highly recommend.
Response from the owner:Thank you, Luke! We're glad to hear about your positive experience with our team. Joseph, Chris, Michael, and Natalia truly appreciate your kind words. We're committed to providing the best service possible and are happy to have earned your trust for the future.
Belinda Babinec
5 days ago
Danny came out to our home to check out our a/c ahead of summer time, and it turns out it needs attention. He arrived on time, was kind and thorough. He explained our options and pricing. I’ve used Oasis before and found the company to be very fair and professional. I plan on calling them in the future, and I would definitely recommend to any of my neighbors.
Response from the owner:Thank you, Belinda, for your wonderful feedback! We're glad to hear that Danny provided you with thorough and professional service. We appreciate your trust in Oasis and your willingness to recommend us to your neighbors. Looking forward to assisting you again in the future!
They also do such a great job - I have been using them for years! Always reliable and prompt!
Response from the owner:Thank you, Jillian! We appreciate your loyalty and are glad to hear that you find us reliable and prompt. Your support means a lot to us!
Blake Mackie
6 days ago
Have had several appointments to have my HVAC serviced - always a good experience. No complaints.
Response from the owner:Thank you, Blake! We're glad to hear you've had a good experience with our HVAC services. We appreciate your continued trust in us.
John Ragir
6 days ago
Oasis HVAC are fair, quick and reliable.
Response from the owner:Thanks, John! We appreciate your kind review!
Leo Bell
1 week ago
Great communication and knowledge of the systems in my house.
Response from the owner:Thank you, Leo! We're glad to hear you appreciated the communication and expertise regarding your home's systems. Your feedback means a lot to us!
Harman Singh
1 week ago
Response from the owner:Thank you, Harman, for taking the time to leave a review. We appreciate your support!
Jennifer Clare
1 week ago
Prompt on time and very efficient / professional
Response from the owner:Thank you, Jennifer, for your kind words about our promptness and professionalism; we truly appreciate your feedback!
We have been using Oasis for our routine HVAC maintenance for the last two years. We have them come out for annual inspection and maintenance of our heating and cooling every season and they do a great job and are very honest in their approach to service. They are a family owned company and the service reflects that. I would highly recommend them to others!
Response from the owner:Thank you, Elizabeth, for your 5-star rating! We appreciate your support and are glad to have you with us.
Jim Lindstrom
1 week ago
Both staff were on time, professional and go the work done well and quickly.
Response from the owner:Thank you, Jim! We're glad to hear that our staff provided timely and professional service. Your feedback is greatly appreciated!
Ryan Gilbert
2 weeks ago
The crew was great. It was a quick and easy experience, we’ll be using this company going forward.
Response from the owner:Thank you, Ryan! We're glad to hear you had a quick and easy experience with our crew. We look forward to serving you again in the future!
Mike Cavers
2 weeks ago
Response from the owner:Thank you, Mike, for taking the time to leave a review. We appreciate your feedback!
Matthew Anderson
2 weeks ago
On time and communicative
Response from the owner:Thank you, Matthew! We appreciate your feedback and are glad to hear that you found our service prompt and communicative.
Florian Reuter
2 weeks ago
Great service. Joseph and Naem did an outstanding job, very friendly and knowledgeable. Highly recommend
Response from the owner:Thank you, Florian! We appreciate your kind words and are glad to hear that Joseph and Naem provided you with excellent service. Your recommendation means a lot to us!
Connie Meyer
2 weeks ago
Quick, knowledgeable advice and service. Really saved the day!
Response from the owner:Thank you, Connie! We're glad to hear that our quick and knowledgeable service made a difference for you. Your support means a lot to us!
Joseph and the entire team did a great job, promptly, thoroughly and on budget!
Sarah Stachelski
3 weeks ago
This is my third time working with Oasis and they are wonderful! Serge and Joseph were quick and efficient.
Response from the owner:Thank you, Sarah! We appreciate your continued trust in Oasis and are glad to hear that Serge and Joseph provided you with quick and efficient service. Your support means a lot to us!
Haley Greene
3 weeks ago
We had Oasis install mini splits in our 118 year old home. We received a very fair price, good communication and swift installation/scheduling. They brought a ton of crew members and completed a two day job in one day. They were very courteous to make sure they were wearing boot covers and also cleaned up as best they could before leaving. They consulted me about every decision so the outcome was exactly what I wanted. I highly recommend Oasis, I am a customer for life now - all things plumbing, heating and cooling!
Response from the owner:Thank you, Haley! We're so glad to hear you had a great experience with our team during the installation of your mini splits. We appreciate your kind words about our communication and the care our crew took. Your recommendation means a lot to us, and we look forward to serving you for all your plumbing, heating, and cooling needs!
Josh Mitzen
3 weeks ago
Very professional
Response from the owner:Thank you, Josh! We appreciate your kind words about our professionalism. Your support means a lot to us!
Marienne Perry
3 weeks ago
Both Plumbers were professional and knowledgeable. They scheduled the work and they arrived when they said they would. The price wasn't cheap but I felt it was reasonable for what was done
Response from the owner:Thank you, Marienne! We appreciate your feedback about our professional plumbers and their punctuality. It's great to hear you found the pricing reasonable for the quality of work. Your support means a lot to us!
jack ginay
3 weeks ago
Chris was here in minutes and finished in minutes. Fantastic

Thanks Mike K and Chris C
Response from the owner:Thank you, Jack! We appreciate your feedback and are glad Chris was able to assist you quickly. A shoutout to Mike K and Chris C for their great work!
Joshua Runnels
3 weeks ago
I had a great experience with Oasis. They were very fast and very professional.
Response from the owner:Thank you, Joshua, for your kind words about Oasis; we appreciate your feedback and are glad to hear you had a positive experience with our team! We're here for all of your HVAC and Plumbing needs!
Dmitry Sturgeon
4 weeks ago
Naem and Joseph were great! Came on time and completed the installation very quickly
Response from the owner:Thank you, Dmitry! We're glad to hear that Naem and Joseph provided great service and completed the installation efficiently. Your feedback is much appreciated!
Jerrad Langlois
4 weeks ago
Naem and Joseph were great.
Response from the owner:Thank you, Jerrad! We're glad to hear you had a great experience with Naem and Joseph. Your feedback means a lot to us!
Dut A.
4 weeks ago
If you don’t do your accounting (invoice policing), they will get some of your money unaccounted for and make it sound like your fault!
Parambir Dulai
1 month ago
Michael, Naem, Serge, and Joseph were amazing. Very professional and efficient. Great work.
Response from the owner:Thank you, Parambir! We're glad to hear that you had a positive experience with Michael, Naem, Serge, and Joseph. Your appreciation for their professionalism and efficiency means a lot to us!
Kristina Menzel
1 month ago
Danny and Hani were great. I had messed up my thermostat and they were able to diagnose and repair it quickly. So much warmer now thanks to them
Response from the owner:Thank you, Kristina! We're glad Danny and Hani could help you with your thermostat and get your space feeling warmer. We appreciate your feedback!
Asclepias
1 month ago
Would give more stars if they were available! The Amirs - a great father/son team- arrived on time and were finished in the estimated time. They are perfectionists and left me with a new H/VAC system that is better sized to my needs and the American Standard brand is made in the USA. Oasis is neither the highest nor the lowest priced but quality for price is ... priceless. You won't be disappointed if you call them.
Response from the owner:Thank you, Asclepias! We appreciate your kind words and are glad to hear that you had a great experience with the Amir team. Your satisfaction means a lot to us, and we're delighted you found value in our services.
Ann Ryan
1 month ago
Joseph came out to diagnose a boiler line leak. He provided options to "cap" the line vs replacing the entire pipe. The work involved cutting the dry wall and I was relieved to see that he didn't need to cut as much drywall as expected...I may not even replace it. Really appreciate the professionalism and the cleanup after his work was done.
Response from the owner:Thank you, Ann, for your kind words! We're glad to hear that Joseph was able to provide you with options and that the cleanup met your expectations. We appreciate your feedback!
Mick Bockstruck
2 months ago
Joseph was very helpful diagnosing a water spot on my ceiling. Was knowledgeable and offered solutions even though it wasn’t an HVAC issue.
Response from the owner:Thank you, Mick! We're glad Joseph could assist you with the water spot and provide you with helpful solutions. Your feedback is much appreciated!
Shawnee Smith
2 months ago
Joseph and Surge provided great service! They helped identify the root causes of some of our issues and provided options to fix them same day. Highly recommend working with them.
Response from the owner:Thank you, Shawnee! We're glad to hear that Joseph and Surge were able to help you effectively and provide solutions. Your recommendation means a lot to us!
Katie Basil
2 months ago
Joseph did a fantastic job performing a maintenance check on my furnace. Very friendly, knowledgeable and polite. Took time to explain everything to me about the inter workings of a furnace. Came on time, worked quickly but thoroughly. Hopefully my kids learned a thing or two as well! Thanks again!
Response from the owner:Thank you, Katie! We're glad to hear that Joseph provided such excellent service and took the time to explain everything. Your satisfaction means a lot to us!
Tom W
2 months ago
Joseph did a good job
Response from the owner:Thank you, Tom! We're glad to hear Joseph did a good job. Your feedback is appreciated!
Bill King
2 months ago
Oasis is our go-to HVAC provider and maintainer because they’ve proven to be trustworthy and reliable over the past 8 years. Today’s annual furnace maintenance by Joseph was no exception. He was knowledgeable and efficient and very informative and helpful in discussing a possible water heater upgrade.
Response from the owner:Thank you, Bill! We appreciate your loyalty over the past 8 years and are glad to hear that Joseph provided you with knowledgeable and efficient service. Your trust means a lot to us!
Michael Nagrant
2 months ago
Joseph did an amazing job and explained everything clearly and courteously.
Response from the owner:Thank you, Michael! We really appreciate your kind words about Joseph and are glad to hear he provided clear and courteous explanations. Your feedback means a lot to us!
Manav Singla
2 months ago
Joseph was great! Mike and team responded super fast and charged a reasonable rate to fix our furnace.
Response from the owner:Thank you, Manav! We're glad to hear that Joseph provided great service and that Mike and the team were quick and affordable in fixing your furnace. Your feedback is appreciated!
Rose Murphy
2 months ago
Joseph was well informed and knowledgeable on my heating unit. Helped me secure a discount on the additional parts needed . They were communicative and were prompt with scheduling.
Response from the owner:Thank you, Rose! We appreciate your kind words about Joseph's expertise and assistance in securing a discount. We're glad to hear that you had a positive experience with our communication and scheduling.
Harvey and Zamuel did a fantastic job installing a new furnace for me. They came on a Sunday morning (after my old system started failing on a very cold Saturday). I’m a loyal oasis customer!
Response from the owner:Thank you, Holly! We're so glad to hear that Harvey and Zamuel provided excellent service with your new furnace installation, especially on a Sunday morning. We appreciate your loyalty to Oasis!
Patrick McCann
2 months ago
Joseph was fantastic. Super knowledgeable straight shooter who fixed my heating problem immediately - literally knew instantly upon looking what was wrong. Gave me all the information with no sales pressure for the life of my unit going forward. When it comes time to replace, I will certainly go with Oasis. Thank you again. Highly recommend.
Response from the owner:Thank you, Patrick! We're glad to hear that Joseph provided you with such excellent service and that he was able to resolve your heating issue quickly. Your recommendation means a lot to us, and we look forward to assisting you again in the future!
Bogdan Adrian Toma
2 months ago
Bad business model. Their approach is: your heater's issue is so bad, it's unsolvable by just getting the one part that's faulty right now. Even if we were to get it and replace it, there might be underlying issues which we can't account for. It's better to just get a new furnace, and if you don't have the money, you can address the so-and-so bank and get credit, they're good people. If we were to translate this model into auto-repair, it'd be like: we could change your tire, but what you really need is a new car. Or - translated in medicine: we could fix your husband's kidney, but how about you get a new husband altogether?

Of course the person that oversaw my furnace this morning was like a witch doctor. Didn't even take the screen off, just turned on the thermostat and listened, then went: "oh, it's so bad it's crazy, the blower motor's gone" and hurried to send me an email estimate of the products they're selling and installing. When all this is happening so quickly, you just know something's wrong. What's wrong is that you brought in and accepted a charge from someone who had no intention of doing any work in the first place, plus they had a ready-made reason to explain your furnace's deficiency without even looking at it. That, in my book, is a scam. It's like paying to bring a store vendor into your house and having them tell you: well, I don't know how to fix this, but we definitely have a replacement in the store. How one can call this "providing a service" is beyond me.

So the firm representative collected a $165 service fee for no service, and to prevent any arguing that there's no service, took the lid off and inserted the screwdriver into the inducer motor to show that it's not rotating. I ended up bringing someone else in, and luckily that person wanted to actually work and get paid for the work, so he replaced the faulty part (which was NOT the blower motor). In a nutshell, my belief about Oasis is that it's filled with people who can only do whole unit replacements rather than actual service. So, next to overpricing, you've got lesser qualifications and false advertising. In an idiomatic sentence, here goes my two cents and 165 bucks.

P.S I won't dispute the demeanor of the representative, he was very courteous and explanatory, except not related to the issue at hand, but merely to the matter of selling a product. I've got no way to verify this, but I bet some of the positive reviews present here were written in exchange for some sort of a discount.
David Lennie
2 months ago
Update: Used Oasis a second time for a completely different problem, and they were equally as excellent as the first time. On time, great communication, thorough, experts in anything HVAC-related. This time, we’d discovered that our developer botched the install of our whole-house humidifier, and Oasis saved the day by properly installing a new one only a couple of days after first discovering the problem. Our days of brutally cracked skin and loose floor boards are now behind us! Thanks again, Oasis team!

When we turned on our central air this season, it didn’t seem to be working at all — it would say it was running but either the air coming out wasn’t cooled or there wasn’t any air coming out at all.

We subscribe to competing company’s monthly maintenance program for our HVAC and plumbing, and they’d tested and passed our unit only a month earlier. I had them come back and they diagnosed the problem as a likely refrigerant leak — they explained how they’d go about fixing it and the cost to repair but highly encouraged us instead to buy a whole new system from them — repair cost ~$2500, replacement cost <$10000!

I decided to get a second quote and found Oasis. I liked that they specialize in heating/cooling, and their refrigerant leak repair process sounded much more thorough and was quoted for about the same as the other company. So I went with Oasis because they gave me more confidence that they could fully fix the problem.

They were available within days. The morning of the service, they called to say that they’d had a bunch of their technicians call in sick so they’d be 2 hours later, which was fine — I was just happy that they gave me the heads up so early in the day. They arrived on time at the later time and spent 2 hours testing, locating, and repairing the refrigerant leak. They were incredibly professional and thorough and our HVAC is back to 100% working order. As an added bonus, they gave us a discount because they’d had to arrive 2 hours later than originally planned!

Excellent service and communication across the board. They deserve all of their 5-star reviews!
Response from the owner:Thank you so much, David! We know your appointment did not go as smoothly as we would have liked, because when it rains, it pours, but you were so understanding and we appreciate it so incredibly much! Thank you for the amazing review, and we hope to come help maintain your system next year. And right on time, too!
Erin W
2 months ago
Unfortunately we had a terrible experience with them. While the technicians were friendly, they did not fix our issue, 3 days and a dangerous gas leak later, we finally had our heat back. In between this mess the owner didn’t even return our calls and no apology when we had to take our kids out of the house for the night. It was during the bitter cold weekend and had to buy space heaters, and then were charged a huge amount for their mistake. I would not recommend if you have an older boiler or unit. I think the lack of experience showed.
Response from the owner:You must be kidding me.
Totally disagree with your statement.
We tried to help you saving your old boiler with minimum charge.
We lost money on this call, but it wasn’t about money.
It was brutally cold and our job is to help people in those situations.
It’s not lack of experience.Its lack of trying to fix something old..We were responding on every your call and making sure that the boiler is fixed.
We came on Sunday and next day after hours in attempt to fix it.You were informed on Sunday that we don’t have that part and the stores are closed .
We never intended to let you down.
Thank you for one star review .
It’s time to replace that boiler.
Richard Anderson
2 months ago
Joseph was great.
Response from the owner:Thank you, Richard! We're glad to hear you had a great experience with Joseph. Your feedback is appreciated!
Brian Oleszczuk
2 months ago
I would like to thank the team at Oasis for bringing warmth back into our home. Our boiler of over 40 years finally decided to conk out, and the crew of Danny, Villy, Baba, and Mikey stepped in with outstanding professionalism. They removed the old unit, installed the new one with care and efficiency, and treated our home with real respect throughout the process. We’re grateful not only for the heat they restored, but for the kindness and skill they showed from start to finish.
Response from the owner:Thank you, Brian! We're so glad to hear that Danny, Villy, Baba, and Mikey provided you with exceptional service and warmth in your home. Your appreciation means a lot to us, and we're happy to have been a part of restoring your comfort.
OH MY GOD! Amazing experience with Oasis!!! Mark & Danny came out to fix a persistent heat issue we were having with heat not getting to the second floor of our unit; we figured it was just an old model and time for a new one. To our surprise, the furnace is FINE, the sensor needed to be cleaned, some things needed to be rewired, but this fixed the issue almost immediately. They were knowledgeable, provided solutions and explained everything super thoroughly to us. After they left, it was like a miracle; the heat started working again! NEEDED on these really cold days in Chicago and with a newborn at home!!

10/10 would recommend and use Oasis again.
Response from the owner:Thank you, Kaila! We're so glad to hear that Mark and Danny were able to resolve your heating issue and provide you with such a positive experience. Your recommendation means a lot to us, especially during these cold days. We appreciate your kind words!
John King
2 months ago
Danny and team were fantastic. I had them install two new variable speed furnaces and a zoning system. It was a little complicated of an install so did have some initial issues, but the team came back as many times as needed to ensure the system was working for us. We are now living in much more comfort than before, and at a very competitive price. We received multiple bids, but wanted to go with Oasis due to Danny's excellent ideas and explanations during the estimate walkthrough. Oasis also came in with the most competitive price so it was an easy decision. Highly recommend Danny and the rest of the Oasis team.
Response from the owner:Thank you, John, for your wonderful feedback! We're glad to hear that Danny and the team could provide the support you needed during your installation. It's great to know you're enjoying a more comfortable home at a competitive price. Your recommendation means a lot to us!
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