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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 Great Lakes 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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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!

Took my vehicle to Great Lakes Auto Repair for an oil leak. They verified my concern, (valve cover gaskets) They went over and above to fix my vehicle at a very reasonable price. Found my new repair shop. They are the best, would recommend them to anyone with confidence. Five Stars! quotes-image
, 02/11/2021
I have done my car and daughters cars for years. Brakes, Tune ups, Battery, window motors, but I can't do a rear main bearing seal. Neither can the master mechanic I use when I can't do a job. He said he would pass but said expect about a $2200 est. That's what the Dealer wanted! Well my car runs great and not ONE drop of oil has leaked in 6 weeks since I picked up my car from you! And at $1200 for a 10 hour 2 man job you did me a huge favor, thanks is an understatement. You restored my faith in people being decent to one another as well as fixed my car.quotes-image
, 04/23/2020
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