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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 Mitch Smith Auto Service, 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

Great place, great people to work with. I've been taking my truck to Mitch's since discovering them a year and a half ago. Maintenance and or needing something fixed I'm bringing here. Big THANKS to all of them!!! Eric, Dan, and Adam in the front office when you walk in, Marie, and Mitch and all service techs, thank you. I'm going to mention one tech in particular, Cody, he had his fill with my truck this last time it was in, thanks so much, you're all awesome!!!
S
, 12/22/2020

I had an oil change for my 2020 GMC Sierra and I didn't have much time in my schedule with the holiday and family here. The team at Mitch Smith Auto was able to get me in right away at my convenience and did a get job! Thanks for the care, concern and professionalism! Two thumbs up!!!
K
, 11/24/2020

Completely satisfied. Will go here first the next time I need work done.
C
, 07/10/2020

These gentlemen are the best service team I have used in 63 years I will never trust service to anyone else again I now feel safe driving my older car They went completely over my older model car and made me aware of wear and tear parts needing service soon as well as fixing my current very serious problem. They are more than reasonable in price and do superior work with patience and respect to customers Thank you so much!!!!!
A
, 05/13/2020

Received fantastic service today from Eric, Dan, and Cody...my car alignment is perfect! Thanks so much!
S
, 03/06/2020

They are the best, they do great work at a great price!
P
, 12/03/2019

  • ASE (Automotive Service Excellence)
  • Jasper
  • Hoosier Motor Club
  • Interstate Batteries
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