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

A & B Automotive Inc.


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 A & B Automotive Inc., 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


Reviews

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I have been to A&B few times now. Rachel is very professional and listens to what we say and they provide very thorough repair and service. Highly recommend them for your auto service and state inspections.

, 06/01/2022

Replacement of rear leaf springs, shocks and rebuild a/c. Replaced compressor and other needed parts with recharging. All work preformed on time and priced quite reasonably I thought. Friendly and professional staff. Also replaced differential oil and conditioner. Only got to drive it about a mile so far, had to drop it off for seat reupholster at Peterson's Auto Trim and the noise I was noticing seems to be gone or at least quieter. We will see soon. I highly recommend this shop. Don't let the full parking lot dissuade you from going there. They apparently have quite a loyal customer base.

, 04/30/2022

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The Folks at A&B Automotive did a great job installing my upper/lower, front/rear adjustable control arms, and the alignment. Taylor did a great job and I couldn't be more pleased! Great Job A&B!!!

, 04/28/2022

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