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

Cruz Auto Repair


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 Cruz Auto Repair, 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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I just met Augustin, and he really took good care of me. Replaced the damaged parts that were causing a vibration in my Dodge Ram. He took it for a test drive and made some recommendations for service. Great service, honest, friendly, and very reasonably priced. Thank you! I highly recommend this shop.

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We were very thankful to have found Cruz Auto Repair on a late Saturday afternoon after the heater hose in our car sprung a leak on the interstate and leaked engine coolant everywhere. Augustin was able to fit us into his shop immediately and replaced the components right there while we waited, staying late past his normal closing time to ensure we'd be able to get home that evening. He was very down-to-earth, knew what he was doing, and charged a very reasonable rate for the work performed.

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I had a master cylinder replaced on my Toyota. Efficient and honest service. It is my newly discovered, go to garage, when I do not have time or the place to work on my own car.

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