A happy family on the couch with a dog.

ACS Air Conditioning Services is the leading HVAC company in Tucson, AZ, for your furnace service needs. We service and repair all makes and models. If you need furnace service, we are the company to call. Our skilled technicians are qualified to solve just about any repair or installation that you throw at us.

Furnace Repair

Don’t get left in the cold! Is your furnace acting up, blowing cold air, or making too much noise? Our experienced team of professionals is here to keep your home warm and cozy. We repair all makes and models, and we will never try to sell you a service that you don’t need. Our technicians are honest and hard working, and we’re always transparent and fair about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. Sometimes a new furnace is the most cost-effective and energy-efficient way to go. We will always be honest with you about a possible furnace replacement. We value our time and your money––we don’t want to perform repairs or service on an appliance that is in need of replacement.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Tucson, AZ, residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two-stage furnace has two settings––full and half speed. This is a more efficient way to heat and provides for better comfort, because it can move the air at a slower pace.

Variable Stage or Modulating: A variable-stage or modulating furnace modulates the speed and heat output based on the temperature outside and the desired comfort level. This furnace only works as much as you need it, making this type the most energy-efficient type of furnace.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

What Size Furnace Do I Need?

We can calculate the correct size furnace for your home. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. Call us at ACS Air Conditioning Services, and we can set up an appointment to calculate the furnace size you might need.

Need Furnace Service?

Contact the experts at ACS Air Conditioning Services.

Call us at 520-230-5668!

Gas Furnace Repair in Tucson, AZ 85747

“Brian arrived on time and provided good explanations of what he did and renewed my main contract on the spot.” – Richard G.

Gas Furnace Maintenance in Tucson, AZ 85750

“Rayan did a great job”

– David M.

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“Courteous, professional, experienced, knowledgeable and very helpful! I got the information and assistance I needed.”

– Kathy A.

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“Jon was polite, thorough, and expedient in the maintenance of our gas furnace.”

– Charles C.

Gas Furnace Maintenance in Tucson, AZ 85749

“He came in the expected time, explained what he found and was professional.”

– Mark H.

Gas Furnace Repair in Tucson, AZ 85711

“Covid sensitive, informative, helpful, quick diagnosis of the issue. ACS sent a tech within a couple of hours of my phone call. Looking forward to getting the new part installed.”

– Deborah T.

Very satisfied with his work

“I wish I could give Noe 10 starts dude was professional, polite, prompt!! Dude knows his stuff. Very satisfied with his work”

– Tyler H.

These guys do a very professional job

“These guys do a very professional job and if there where any changes needed to be made, they did it without question.”

– James S.

Manny was great. I would recommend him to anyone

“Manny was great. Fast, knowledgeable, & courteous. I would recommend him to anyone.”

– Tony L.

Gas Furnace Maintenance in Tucson, AZ 85715


– Jack S.

ACS Air Conditioning Services proudly provides HVAC service to Catalina Foothills, Continental Ranch, Dove Mountain, Green Valley, Marana, Mount Lemmon, Oro Valley, Picacho, Red Rock, Rillito, Sahuarita, Tucson, Vail, and the surrounding communities. Visit our service area page for more coverage details, call us at 520-230-5668, or request service online today.