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 Barnhill Automotive, 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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Jacqueline Abdul-Rahman, 11/08/2022
I've been very pleased with the service and the scheduling for getting regular maintenance as well as unscheduled repairs that need to be done. The owner, Tommy, is very personable and explains as well shows you what work needs to be done and gives you an option on when you need or want to pay for it to be done or if you want to wait until it really has to be done. He's very knowledgeable and tries to work with you on getting the best prices for your parts as well as overly considerable about service prices. I was recommended by my cousin and I was pleased, so I recommend him to others as well for Honda especially vehicles. He does have a lot of work, because he is very dependable. Sometimes I wish he would get a little more rest.