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Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Olympic Automotive Services
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 Olympic Automotive Services, 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.
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Abby K, 03/16/2020
Honest, hard working people. I've had some major work done on my car here and they've always managed to fit me in and get the work done fast. It's rare to find mechanics who give their honest opinion/ understand the most affordable way to do things. On multiple occasions they've checked out my car for minor noises or vibrations and have never charged me. Really appreciate the integrity these guys have. Will continue to bring whatever car I own here.