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Your Tread Quarters Location:

(301) 829-1155

202 E. Ridgeville Blvd.
Mt. Airy, MD 21771

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Hours of Service:


7:00AM - 7:00PM


7:00AM - 7:00PM


7:00AM - 7:00PM


7:00AM - 7:00PM


7:00AM - 7:00PM


7:00AM - 7:00PM


9:00AM - 5:00PM

A/C Check - $29.99

Car Air Conditioning Service and Repair

Air conditioning is a critical component of a comfortable car ride. Take care of your car's A/C system before the next heat wave. Tread Quarters will help keep you cool with regular routine inspections and maintenance to make sure your car's air conditioning operates at peak efficiency. Request an appointment today with one of our expert technicians.

The ABCs of A/C

Your comfort depends on periodic inspection and maintenance of your car or truck's A/C system, including these components:

Engine Compartment

  • Compressor – is a pump that draws in refrigerant, compresses this gas, and forces it into the condenser.
  • Condenser – is a small radiator that causes the refrigerant gas to cool and condense into a liquid.
  • Receiver-Dryer – removes any water that gets into the system, preventing ice crystals from forming.
  • Thermal Expansion Valve (TXV) – causes the high pressure refrigerant to rapidly expand, drop in pressure, and cool even further—down to 32-degrees F.
  • Belt – drives the compressor. It can either be the serpentine belt or a separate V-belt.
  • Refrigerant – most commonly R-134a. This fluorocarbon is more environmentally-friendly than Freon, but it still poses global-warming concerns. A new EPA-approved refrigerant, R-1234yf, will be phased in by 2017.

Passenger Compartment

  • Evaporator – is the component that actually “conditions” the air in the passenger compartment. As the refrigerant comes in contact with the warm air in the passenger compartment, the cold, low pressure liquid absorbs a tremendous amount of heat and turns back into a gas. The evaporator is usually located in the foot well.
  • Fan – circulates the cold air throughout the passenger compartment.

Your Car Air Conditioning Experts

Our technicians have the training and specialized equipment to keep your vehicle's A/C system operating at peak capacity. Request an appointment for A/C system service today. We are open evenings, weekends, and most holidays, with same day appointments available.


+2010 Honda Accord. Dealer price based on dealer phone shops.


For even more great information, visit our Learning Center section for FAQs and Car Care Tips!

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Tread Quarters
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