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 Varesi Service & Repair LLC, 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.


image-people-driving

OUR REVIEWS

 (23 Reviews)
image-quotes
reviewiconTires, near Oregon, WI

We were leaving our driveway for a 4000 mile road trip out west when our tire pressure light came on. We decided to stop by Varesi auto, as they’ve been so wonderful in the past, and see if they were able to check our tire. We pulled in to their shop and they immediately came out to help us. Steve found a nail in our tire. He and his wife plugged the tire with in 5 minutes and we were on the road on our trip! Wonderful family auto service!!!

, 03/17/2025

partners

ASE (Automotive Service Excellence)
BTB - CSC
Bridgestone
ac
FMP
Splash
Car Care Aware