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 Tech Center Auto Electric, 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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I bought a used Jeep Liberty and during the 3 months I owned it the battery went dead intermittently 3 times and developed other electrical issues with the dome light, lock switch, and mirror controls. Tech Center Auto had my vehicle for 3 days and Greg gave me regular updates on the status (which was greatly appreciated). They found the issue and repaired it in less than a week and at a VERY reasonable price. These guys are good, and the reviews and references I received were backed up by their work!!
I highly recommend Greg and his team at Tech Center Auto. They service all our fleet vehicles and my personal cars. They are always accommodating, honest and very fair from a price stand point. If you are looking for an experienced garage look no further.