Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Gary Wille's Auto & Tire Center
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 Gary Wille's Auto & Tire Center, 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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5 stars 12-29-21 update to last years review. Extraordinary service 1 1/2 hour before closing. Spark plug wire cut (twice in less than a month) which caused other damage as a result. They took care of me right away. They still had one of the old uncut spark plug wires from my last visit. That and the other damage was fixed quickly and FREE of charge. Still driving from Madison for their excellent service. Wondering why there is no leave a review option this time.
Cat 56, 12/30/2021
Tyler, Hunter and team are the BEST! They are so kind and patient with my 94 year old mother and take such great care of her car. Even though I don't live in Oregon, I take my car to them. I hope you will support them also.
Kathy Logan, 12/29/2021
Ina Pillar, 12/17/2021