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Mike's Automotive Service

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 Mike's Automotive Service, 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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Testimonials

reviewiconProfessional Service
Brakes, near Kewaskum, WI
Had no idea my brakes were wearing thin and would have more than likely had an issue in the near future if not being notified of the potential eminent failure. Mike's took care of the issue immediately and repair work was awesomely completed to my satisfaction.
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Car & Truck Care, near Kewaskum, WI
I went to Mike's for a second opinion on a repair that another mechanic quoted at $2,500. Mike's figured out the problem and fixed my car for only $160 all in one day. I was very happy with the efficiency customer service, communication, and efficiency!
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