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    Tue 8:00AM - 5:30PM
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802-652-9991 | 65 Elm Ct Colchester, VT 05446

AC Air Conditioning Auto Parts

MasterTech Automotive: Your Truck or Car's AC System

At MasterTech Automotive we understand how your AC system works. Your car or truck's AC system uses a Freon gas type refrigerant for cooling. For automotive applications, Freon is refined into tetrafluoroethane, a non-toxic, non-flammable and non-corrosive gas called R134a. The ability of the refrigerant gas to change its physical properties into a liquid as it is compressed and condensed keeps you cool on hot summer days.

Discover More Reliable AC Parts

If your AC system starts blowing warm air come by the store at 65 Elm Ct and talk with one of our auto parts specialists to determine what parts you need to get your AC working again.

Your AC compressor is the auto part responsible for compressing the refrigerant R134a. When it is compressed it becomes very hot. Because hot is the opposite of what drivers want in an AC system, the refrigerant must be cooled.

R134a is cooled by your car AC condenser. This auto part is a series of coils that look very similar to a radiator. Just like a radiator, outside air passes over the condenser to remove the heat from the compressed gas. It is then condensed into a very wet cold liquid. The receiver-drier absorbs excess moisture from the liquid. Next, your AC filter traps debris within the liquid that can cause clogging in your car's AC system. Call 802-652-9991 today and let our auto parts specialists help you find the right compressor, condenser or receiver drier to fit your car or truck.

At this point, the refrigerant liquid is still under too much pressure. The expansion valve and orifice tube take over and force the refrigerant to change from a high-pressure liquid refrigerant into a low-pressure liquid refrigerant mist before it enters the evaporator.

As the low-pressure liquid refrigerant mist flows through the evaporator, a blower motor pushes air across the cold tubes of the evaporator and cooled dry air flows into the passenger compartment of the automobile. The accumulator is a holding tank for the refrigerant as it exits the evaporator. While the refrigerant is circulating inside, the accumulator removes any moisture that may be present.

Call 802-652-9991 today and let our auto parts specialists help you find the right expansion value, orifice tube, and evaporator to fit your car or truck.


What Our Customers Are Saying

We love our auto guys at MasterTech - they really take care of us. THANK YOU!

, 31 March 2022

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I bring my car to MasterTech Automotive for service, oil changes, tire changes and undercoating. I travel to COLCHESTER from MONTPELIER for this... Do I need to say more?

, 10 November 2021

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I showed up first thing in the morning and was greeted by Keith. He said good morning and asked how he could help. I explained my situation with my car and listened and stayed calm and said that even though they were busy he would work it in and check back at the end of the day. I get a notification midday that the car was done! He picked me up in my car!! No smoke and mirrors, straight talk from Keith! The best service I've experienced from a repair shop. He dropped me off and picked me up. He was knowledgeable and stayed calm. If I need the car serviced again, I'm not calling anyone else.

, 13 July 2021

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I wanted a second opinion on fixing the convertible top on my older BMW. I am so glad I did. Keith researched the issue and fixed it quickly and reasonably. I would recommend this garage to anyone.

, 18 May 2021

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Fast and friendly service, at a nice price. I'll certainly recommend them, and return for any other work.

, 10 May 2021
I dropped my car off at Master Tech in Colchester to have my snow tires taken off and the regular tires put on. I left a note asking if he could help with the battery. Keith called me first thing the next morning and said he would drop my car off at my home and charge my car battery for me. Talk about service..........I have always been happy with the mechanical and customer services at MasterTech and I highly recommend Keith.

, 24 March 2021
  • ASE (Automotive Service Excellence)
  • CARQUEST
  • TECH-NET
  • Jasper
  • World Pac
  • Interstate Batteries
  • Car Care Aware
  • Call Us For Service: 802-652-9991