Skip to main content

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 Car Doc On The Island, 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.

Yellow road marking road surface

Testimonials

reviewicon
I was referred to Car Doc by two different people. I received expert advice and service. The staff is great! I will be using Car Doc from now on. I’m very happy for this referral!
~ , 06/20/2025
Read more reviews >
reviewicon
By far the best mechanic shop I could ever ask for. 10/10. My suv unexpectedly broke down. I called to see if I could get it towed there and Desiree was so friendly. Once they diagnosed the issues I panicked bc it was something I couldn’t afford. Desiree really and truly went out of her way to help me find a solution to my problem. Not only did she recommend the finance offer but she also suggested a few other ways to help financially. She quickly sent me the pictures of what needed fixed and quotes on prices. She was very honest about what was a priority to fix and what could wait. I know nothing about vehicles and I felt totally comfortable with her suggestions and felt like she honestly cared and wanted to help. I got approved for financing so I was able to get it fixed and didn’t have to pay up front. I really don’t know what I would do if it wasn’t for Desiree. I got my car back alot sooner than I expected as well. I can’t recommend going anywhere else for auto repair after coming here. I’ll forever be a fan of the car doc! Thank you all for your hard work!
~ , 06/18/2025
Read more reviews >

Copyright @ Repair Shop Websites. All Rights Reserved | View Our Privacy Policy

  • American Express
  • Cash
  • Check
  • Discover Card
  • Master Card
  • Visa