Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Shelton Automotive Inc.
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 Shelton Automotive 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.
More AC Repair Services:
We had a timing chain replacement in our HHR, got a fantastic job no problems. The service was good and fair priced. In January of this year we had a problem car just quit. Started it up, engine came on, the code said it could be a couple of things. The parts were going to be expensive so I took the HHR my wife's car in, it has to be dependable. Shelton's started doing some checking and found the throttle body was just dirty gummed up. A good cleaning and $50 later it was done. They could've charged for those expensive parts and I would never known it so I really trust them and I've recommended a couple other friends to them and they've been very satisfied also. Now we are going to set up a maintenance program for our cars which will take away a lot of worries about breakdowns. My wife hauls our great grandkids around and grandkids so we need a car that's dependable. Thank you Shelton Automotive, we appreciate all you do.
Bruce Cantley, 02/10/2022
Overall service is good !!!!
Gerald Dawson, 10/06/2020
Batteries, near Flint, MI