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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 Kingwood Service Center, 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


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ASE Master Technician
ASE (Automotive Service Excellence)
ACDelco
BG Products
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Car Care Aware

What our clients are saying about us

We have established longterm and stable partnerships with various clients thanks to our excellence in solving their automotive needs!

The service here is amazing. I started off with a horrible day coming to the realization that my brakes were going out and I needed to get them repaired sooner rather then later. I stopped in here as I was recommended by a friend. They were so kind and accommodating. Mike made sure I was taken care of and my car is being repaired within the day. They are efficient and go over everything with you in detail before they begin repairs. I highly recommend coming here. I will definitely be coming back and will be a long time customer for the future. Thank you to everyone at Kingwood Service Center! quotes-image
, 12/05/2023
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Great group of guys who are knowledgeable, skilled and friendly. I recommend them highly.quotes-image
, 11/30/2023
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