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Gremillion Mechanical Heating & Air Conditioning

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About Gremillion Mechanical Heating & Air Conditioning

Gremillion Mechanical is a family-owned and -operated company based in Chicago, Illinois. We are licensed as a mechanical contractor in the state of Illinois and are completely insured.

Gremillion Mechanical is Chicago's excellent heating and air conditioning repair contractor, working to provide quick and reliable heating, furnace, air conditioning, boiler, radiant floor, hot water heating, humidifier, maintenance, and installations to the Chicagoland area.

Our heating and air conditioning repair technicians have lived in Chicago and worked hard to reliably serve the Chicagoland area for over a decade, providing locals like you with heating repair and expert installation.


3526 S. Paulina St
Chicago, IL 60609

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Question and answer

Q. What advice do you have for a customer looking to hire a provider like you?

A. Always be aware of the person you are hiring. If there is no one of your friends who has used HVAC services recently, you will need to search online for the reputation of this person. Usually good places to start would be Google Places, Yelp, CitySearch, InsiderPages, JudysBook, AngiesList and MerchantCircle.

Our company reviews are glowing everywhere and we are proud to say that we provide the highest quality customer service and deliver timely and affordable heating and air conditioning repair services to the whole of Chicagoland, including the surrounding suburbs.

We offer 24 hour emergency services 7 days a week.

Q. If you were a customer, what do you wish you knew about your trade? Any inside secrets to share?

A. Last week, one of our technicians was sent on just this type of call ”We just need some freon put into our a/c unit, we have it done every year”. Even though our technician informed the home owner that the air conditioning unit was over 20 years old, and adding enough freon to get the system to cool the home might break the old a/c unit, the home owner instructed our technician to “Just add the Freon”. Gremillion Mechanical can only make suggestions to home owners and in the end they are the boss . We will do what is requested of us as long as it will not be of any hazard to anyone.

compressors 278x300 Gold Coast Air Conditioner old but reliable?After the unit was charged with freon, it ran fine and started to cool the Gold Coast home down. This lasted long enough for the technician from Gremillion Mechanical to get his tools to the truck and fill out the service invoice for the client. When our technician went in to present the invoice to the home owner he walked past an air vent blowing warm air. He examined the air conditioning condensing unit outside and found the cold freon that should be returning to the outside unit from inside the home was warm, this is not a good sign. He hooked up his gages to the unit again and found the compressor valves had failed, the unit will not be cooling this Gold Coast home today.

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