
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
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 Wilson Garage, 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 Customers Are Saying
I have had many different cars and mechanics throughout my life. This team has worked on all my Chevys. Currently my 1993 Indianappolis 500 Pacecar Camaro and my 1997 30th Anniversary Z28 Convertible. They are my gems and they have been reasonable with pricing, timely in returning the vehicles and usually available. They have not done unnecessary work when I suspected greater repairs were necessary. They fixed issues directly saving me money on my AC, starters, suspension and tires. The only thing that was not a job they would do was my Convertible top. But at least they were honest in their services. I recommend them 100 percent.
Thank you for accommodating a scheduling misunderstanding when I brought my daughter's car in for tires! As an out of state mom who drove in to help with an appointment conflict, I appreciate your willingness to help us out!
Called Monday morning and they got me right in for my alternator. Great service and very friendly.
All I can say is Chris, Misty and everyone that works there go above and beyond all the times that I have used them. Here is another place that is not out to rip you off. God Bless You All!!