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 Leo's Auto Care, 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.


Reviews

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It was a quick and nice visit. They patched my tire. Joaquin (i think he is the owner) was really nice and friendly. I highly recommend this place.

, 03/19/2025

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Yesterday I took a 2022 mazda to get it checked out. I worked with Juan. He was amazing. He took it out for a test drive. We went together and he did a thorough check of the vehicle. I would definitely recommend this place, and to take if you want to get a used car inspected prior to purchase.

, 01/08/2025

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I can’t be more happy for writing this review! I came in today because my car was having some kind of weird issue (at least to me) and as soon as I stepped in the auto care, the lady at the front desk was very welcoming and polite. I was recommended to reach Mr. Juan and he was there today. He was super nice and polite and he took the time to check on my car and explain to me everything about the issue. The process was super smooth and the price was very reasonable! I highly recommend this place, you won’t regret it!

, 01/07/2025

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