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Best Auto Repair, Thornhill

Specializing In:
Computer Diagnostics
Fuel Injection & General Repairs

TECHNET CANADA

  • Auto Trust Technicians
    905-881-6361

    79 Green Lane
    Thornhill, Ontario L3T 6K6

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Replace Your Car's AC Thermal Expansion Valve or Orifice Tube


Your car or truck's AC system is under extreme pressure and the thermal expansion valve or orifice tube monitors the amount of pressure and the temperature of your A/C system. It calculates the precise amount of refrigerant that can safely go into the evaporator. A failing expansion valve or orifice tube often causes a vehicle's air conditioner to blow hot air.

Replace or Repair

  • Expansion Valves: Too much refrigerant causes your evaporator to get too cold whereas too little refrigerant would result in inadequate cooling. The expansion valve is a complex valve that regulates refrigerant flow. This process of metering the refrigerant adjusts the flow according to the temperature of the refrigerant in the evaporator coil. Talk to one of the pro mechanics at Auto Trust Technicians, as this part can be replaced on its own and does not require the entire replacement of the AC assembly.
  • Orifice Tubes: Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen. Often fixing a "bad orifice tube" requires replacing the entire evaporator assembly.

More AC Repair Services:

Truck and Car AC Repair Services

Freon Recharging Services For Your Car Or Truck

AC Evaporator Services


what our customers say

these wonderful souls saved my life (okay not literally but they saved my road trip). My car broke down the day before I had to leave for a long drive to head way up north and these wonderful individuals were able to fit me in ASAP and get my car fixed and safe to make the trip! I had no delay because of them!
D
, 03/24/2022

Mike and his team are the best!!
W
, 03/24/2022

Great and professional service and reasonable prices thank you Mike.
P
, 03/24/2022

While mostly a mechanic shop, Mike had a car for sale that we found on AutoTrader. I had dreaded the thought of buying an earlier model used car as all of them seemed to be uncertified on shady lots. After talking to Mike for a few mintues, my first feeling was relief. He was very reasonable to work with and allowed us (with some reasonable stipulations) to take the car to be reviewed by our mechanic. We did this, and promptly purchased the car. It was clean and Mike was upfront with the CarFax report. Thanks so much Mike for your help in making what I was expecting to be a nightmare a very easy and honest process.
J
, 03/24/2022

Mike was wonderful to work with, and was wonderful work my daughter's first car.
M
, 03/24/2022

I just want to say the Mike and the team at Auto Trust Tech are sensational. They go above and beyond for their clients, with exceptional service and care. They not only care about the vehicle as if it's their own, they care about their clients and that level of customer service I haven't seen before. I am so lucky my brother and father referred me to this mechanic and I truly feel like you're in the best of hands.
P
, 03/24/2022

  • ASE (Automotive Service Excellence)
  • CARQUEST Canada
  • TECH-NET Canada
  • World Pac
  • BG Products
  • Hertz
  • Car Care Aware
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