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 Currey Automotive, 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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I have been taking my car(s) to Curry Auto for over 15 years. The customer service that Brian and John provide exceed expectations. They get the job done right the first time, every time! Brian is a fair person, he will take the time and explain the how and why work has to be done. I highly recommend them to service your car.
My thanks to Brian. Took my car in for a last minute oil change. He had my car done in a timely manner and answered my questions clearly. On the way home, I picked something up in my wheel and Brian raced to the rescue. He fixed the problem that had nothing to do with the oil change just so I would be safe. Really kind and did a great job.