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 Conner Auto 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.
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I've been a long time customer, 15 years or more. My experiences here are always the same. I try to call for an appointment (if I can), drop off my car, I get a call when it's done. Always done in a timely manner. Always professional. I have never worried that too much or too little was being done. I've never worried about his honesty and I've never worried about the quality of his work. Over the last year my son has been bringing his car here. Randy has treated him as well as I had expected. This is his first car and it has been a project. When we have reach our level of comprehension we bring it here, They find and fix the problem. I can't thank him and his crew enough for how my son has been treated, that's more important to me than any of my cars.
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