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 Affordable Auto and Truck 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.
More AC Repair Services:
I went looking for a good honest local mechanic. They are not easy to find. Bob took good care in finding the cause and resolving the issue with my vehicle. Bob even showed me the damage done to the radiator and carefully explained what was needed. I felt like they did a good job for an honest price. I take good care of my vehicles and now I know where I can go to get them serviced to last many more miles. Sept. 2022
Mr. Bob Ortiz and his staff provided excellent service to me after I encountered a problem driving down to St. Petersburg, Florida from New York City. He was professional, courteous and resolved the problem in a quick and timely manner. His rates are very reasonable. I will recommend him to my family/friends who live in the area or travel to the area.