240-347-4884 | 570 Northern Ave, Hagerstown, 21742
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Dwayne's Auto Repair
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 Dwayne's Auto Repair, 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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Daniel H, 04/21/2020
Called around to many repair shops in the area, checking pricing. Dwayne's offered the best deal by long shot. Not only was the price of service the best around, they went out of their way to offer a great customer experience. Provided me with a ride home to wait while repairs were being done and offered to come and pick me up if needed. I can't recommend this family owned establishment enough! Great all around! Will definitely be my "go to" auto repair shop for any service needed in the future.