Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Green Machine Automotive
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 Green Machine 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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Green Machine has been my primary work place for maintenance or any service on my 2006 Cadillac Escalade ESV for 2 years. Sabino and Ernesto explain each work detail completely and recommend the best service for longevity of my vehicle. Ernesto accommodates a scheduled date/time for any work I request promptly and no delays. I am pleased with the work ethics of honesty applied with their service. Thank you !!!
Joanna Torre, 11/05/2020
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