Clarksville, MD

12411 Clarksville Pike
(410) 531-6116

Columbia, MD

6810 Oak Hall Lane
(410) 381-1124

Gaithersburg, MD

19300 Woodfield Rd
(301) 963-0660

Clarksville, MD

12411 Clarksville Pike
(410) 531-6116

Columbia, MD

6810 Oak Hall Lane
(410) 381-1124

Gaithersburg, MD

19300 Woodfield Rd
(301) 963-0660


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Maryland Heating & A/C Repair

Your comfort is important to us, which is why we take heating and A/C problems just as seriously as engine or transmission issues. Simply bring your car to any of our four locations in Glenwood, Gaithersburg, Columbia or Clarksville and we’ll get your heat or A/C back up and running in no time.

Heating and A/C Problems We Repair

Surprisingly, there are many different ways a relatively simple system such as you car’s HVAC may malfunction. At Hillmuth Auto Care, we diagnose and repair them all:

  • Car heating or cooling not working
  • Car heater blowing cold air
  • Car A/C not cool enough
  • Musty odor when the A/C is on

If you’ve experienced either of these problems, you know how unpleasant, and even dangerous your commute may become when heat or A/C are not working properly. Let us help you take the unnecessary frustration out of your day!

Causes of Heat and A/C Failure in Cars

There are numerous things that can wear, fail or simply go wrong when you are trying to operate your vehicle’s heating or cooling system. Most of the time, cooling issues can be tracked down to one or several of these malfunctions:

  • Mold or mildew accumulation in the evaporator
  • Loose or leaking hoses
  • Failed fan
  • Failed seals and vacuum leaks
  • Failed condenser, evaporator or blower motor
  • Clogged expansion valve
  • Failed switches, fuses and relays
  • Refrigerant leaks

Heating issues are often caused by:

  • Low antifreeze level
  • Contaminated coolant
  • Thermostat failure
  • Blower fan failure

No matter what it is, our experienced auto heating and A/C repair professionals will find it and fix it, making it possible for you to enjoy your car once again.

Air Conditioner Service

Air conditioning service is recommended to be performed seasonally in order to keep your A/C system free of the above issues. This service includes an A/C performance test, system pressure check, condenser and radiator cooling fan operation check, inspection of all A/C components for wear, leaks and proper operation. At the end, refrigerant is evacuated and recharged. Let us know if you are interested in proactively maintaining the health of your vehicle’s HVAC system!

Schedule your heating or A/C repair appointment today at one of our locations in Gaithersburg, Columbia, Glenwood or Clarksville.

car air conditioning
car radiator
car antifreeze test
thermostat valve

Automotive Repair Specials

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Awards and Recognition

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“The staff at Hillmuth Automotive has always been honest and helpful. I had a difficult situation with an insurance claim and they went the extra mile to ensure I got the coverage I needed. They are always courteous and timely.”

-Jo Ellen Nauman, Olney


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Howard County Auto Repair and Auto Service: Columbia (21044, 21045, 21046), Clarksville (21029), Cooksville (21723), Dayton (21036), Elkridge (21075), Ellicott City (21042, 21043), Fulton (20759), Glenelg (21737), Glenwood (21738), Guilford (20763), Hanover (21075, 21076), Highland (20777), Marriottsville (21104), Savage (20763), West Friendship (21784), Woodbine (21797).

Montgomery County Auto Repair and Auto Service: Ashton (20861), Bethesda (20814, 20815, 20817), Brookville (20833), Cabin John (20818), Chevy Chase (20815), Damascus (20872), Derwood (20855), Gaithersburg (20882, 20878, 20879), Germantown (20876), Kensington (20895), Olney (20832), Potomac (20854), Rockville (20850, 20851, 20853), Silver Spring (20904, 20905, 20906)

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