336-724-7463 | 3500 N Patterson Ave, Winston-Salem, 27105
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 Whiteheart and Sons Automotive Service 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.
More AC Repair Services:
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Dee Bottomley, 10/12/2022
I was coming back from Kentucky and broke down in Rural Hall with my elderly mother in tow. I have AAA and they left me stranded for 3 hours until they finally called Whiteheart to come and get us. And it was only 30 minutes from the time Whiteheart got the call that they were there to help. I was angry with AAA because they did not call this company sooner. Had I known of this company before this night I would have called them directly and skipped AAA. The tow truck driver (sorry I do not remember his name) that came to rescue us was so polite, professional and and helpful. It had started raining and he let us get in the truck while he hooked the car up. He got us down the road and home within an hour, along with some great conversation. I am so appreciative that he came so quickly and got us where we needed to go safely. THANK YOU!!!!