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 Stan's Auto Service, Inc., 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.
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!
It's so refreshing to find a car repair center that is honest and respectful. My car had been making a strange noise for weeks and I was concerned. Bill Sayles spent the better part of the morning investigating and finally called to say there was a major problem that would cost over $1,300 to fix. I told him to fix it but he recommended I call the dealer and see if it was something they would cover. He was right, it was covered and because of Bill I saved quite a bit of money. Stan's garage will be taking care of all of our cars from now on.
I have been a customer at Stan's Auto for about 20 years. I have found them to be honest and fair. I can trust their recommendations about the repairs my car needs. Bill, the owner, is knowledgable and fair. I highly recommend Stan's!