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Find Central a/c service or repairers in Markham

Avatar for Integrated Systems Technology
Integrated Systems Technology
4.4(
107
)

Serving Markham, IL and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"He troubleshooted and repaired the faulty wiring between my office switches and two outside lights - and was ready on the day of the quote. He answered all of my questions in a way I can understand. He was friendly the entire time that he was working"
Recommended by89%of homeowners
Avatar for R&J Preventative Maintenance
R&J Preventative Maintenance
4.9(
31
)

Serving Markham, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Emergency services offered

Warranties offered

"R&J Preventative Maintenance responded immediately (on a Sunday!) and they had someone out the next morning to diagnose and repair the issue with our 2005 beverage fridge! We did not want to replace it and he had the parts with him and was able to repair! Amazing! (He also serviced our Sub-zero fridge!) We will definitely use them in the future and highly recommend!"
Additional Photos
Additional Photos
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Additional Photos

+6

1 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for AWE Air Water Energy
AWE Air Water Energy
4.7(
588
)

Serving Markham, IL and surrounding areas

Approved

In business since 1911

Free estimates

Emergency services offered

"They were able to send out a tech to repair our AC pretty quickly (within a few days), even though this was during a bout of unusually high temperatures. The tech arrived towards the end of the given arrival window; even though he was still within the window, they called me that day to let me know he would be later rather than earlier, which was nice. The tech diagnosed the issue, and discussed options with me and fixed it (low line refrigerant, possible leak). All that was great, and prices seemed reasonable. The only negative part of the experience is that there was an extra charge to de-ice the frozen interior coils. I could have done that in advance if I knew I was supposed to (the tech seemed surprised I hadn't, or that I wasn't told to). Maybe that's obvious to others, but it's not that big of a deal, just an an annoying extra cost."
Owner Ray Grimm
We're the ones with the yellow trucks, and cars, too!
Expert service keeps your home healthy
Solar Power
Regular Maintenance

+10

157 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Frostcore Inc.
Frostcore Inc.
5.0(
7
)

Serving Markham, IL and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"Frostcore made contact with me immediately and we scheduled a same day appt. due to my AC Blower which had stopped working. It is a very hot and humid day and Sami and his business partner explained throughly what repairs were needed to get my AC unit working again. They gave me a fair estimate and final price and I intend to give Frostcore my repeat business. They were both very knowledgeable friendly and pleasant to work with and I welcome them as my future cooling and heating pros. Thank you."
Gallery
Gallery
Gallery
26 neighbors recently requested a quote
Avatar for Rams Mechanical Heating & Cooling
Rams Mechanical Heating & Cooling
5.0(
4
)

Serving Markham, IL and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"I can't recommend Rams Mechanical Heating & Cooling enough. Ram provided top-notch service—he arrived exactly when he said he would and handled the job with total professionalism. What really stood out to me was that he followed up later just to make sure we were good. It’s rare to find that kind of care these days. If you need heating or cooling help, call Ram!"
5 Ton Condenser
New Evaporator Coil
Coil Installed
Condenser Installed
Old Condenser

+1

Response time1 day
3 neighbors recently requested a quote
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FAQs for central a/c service or repair projects in Markham, IL

Coils work to absorb heat into the refrigerant that flows through them, moving heat from one location to another. For air conditioning, the evaporator coil inside the air handler in your home absorbs heat. It then transfers the heat outside to the condenser coil, where it releases it. The opposite process happens for heat pumps. When the coils get dusty and dirty, it reduces how well these components work.

Skip regular cleanings, and dirt, debris, and mineral deposits will blanket your evaporator and condenser coils. When that happens, the coils can’t shed heat efficiently, so the system works harder and your energy bill climbs. Over time, overheating strains the compressor and can trigger a full breakdown—an avoidable repair that often costs far more than a simple annual cleaning.

AC coil cleaning is an investment that pays for itself in the benefits it provides. Dust‑caked coils force your AC to run longer, so you spend more on electricity and rack up extra wear. A quick professional cleaning restores efficiency, trims monthly bills, and eases strain on expensive parts. Over the long haul, that small yearly fee delays pricy repairs and stretches the unit’s lifespan, making coil cleaning one of the smartest HVAC tune‑ups you can schedule.

Watch for higher electric bills, rooms that stay warm no matter how low you set the thermostat, or an AC system that runs nonstop. Extra humidity and frost on the coils are also red flags. Catching these clues early lets you schedule a quick cleaning before the system overworks itself and triggers an expensive breakdown.

Your AC cleaning technician starts by shutting off the power to the unit and removing the faceplate. Compressed air and a vacuum hose blast away loose debris, followed by a coil-safe, no-rinse cleaner that dissolves stubborn grime. After the solution has soaked in, the professional wipes the fins, reassembles the housing, and restores power, leaving the system ready to cool at peak efficiency.

The Markham, IL homeowners’ guide to central a/c service or repairs

From average costs to expert advice, get all the answers you need to get your job done.