434-973-3108 | 1067 Gasoline Alley, Charlottesville, 22091
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 Auto Doctor, 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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Most vehicles, Light Trucks
Melanie Brooks, 05/18/2022
These guys are amazing! I was driving through Virginia with my 2004 Ford E350, on my way to Colorado, when I couldn’t put gas in my van (it would just flow out and down the side of the van). I had previously spent a small fortune to have a mechanic fix the problem and Denver, but he failed. Now it had gotten worse and I feared that I was going to be stranded. Not only did Auto Doctor fit me in on the same day I called, Kiefer quickly and correctly diagnosed the problem and fixed in under an hour! Not only that, but he rode with me to the gas station to verify that I could fill up the car. I can’t say enough about the professionalism of these guys. Also, as a single woman, I felt that they respected me and discussed the details of the issue as they would with anybody else. Lastly, it was impressive how the owner initially assessed the problem and then assigned the guy who had expertise in the area.