Working Hours
  • Mon 9:00AM - 5:00PM
    Tue 9:00AM - 5:00PM
  • Wed 9:00AM - 5:00PM
    Thu 9:00AM - 5:00PM
  • Fri 9:00AM - 5:00PM
    Sat 9:00AM - 5:00PM
  • Sun Closed
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540-628-0100 | 198 Tyler Von Way, Fredericksburg, 22405

Replace Your Car's AC Thermal Expansion Valve or Orifice Tube

Auto Chiefs Service Shop

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 Auto Chiefs Service Shop, 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:

Truck and Car AC Repair Services

Freon Recharging Services For Your Car Or Truck

AC Evaporator Services


What Our Customers Are Saying

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Need a car it's the place to go

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Mike and ALex are the most professional people to deal with Mike was awesome great personality and the rest of the crew also that works at Auto Chiefs . My drive was worth meeting the the crew I would recommend Auto Chief to anyone local & abroad . Service is the best you will ever find at Auto Chiefs and I love my Nissan thank you Auto Chiefs .

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This place is a goldmine for automotive repairs. The only place I have been to where the staff gives you honesty. A rare treat in that industry. There have been so many times where they have reviewed my vehicle's issues and gave me realistic notices about the repair work. One example: The transmission in my old car was slipping. They diagnosed the issue and advised me against the repair on the car to avoid me putting money into a vehicle, that based off its age, would be back in the shop a year later for another major repair. No other shop I 've been to would have turn down work for the sake of their customer's wallet. I highly recommend this place.

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Absolutely love this place. Good selection GREAT PRICES AND FRIENDLY PLEASE PEOPLE!!!!!

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Love these guys. I take my motorcycle to them every year to prep for the summer, do my upgrades and general maintenance. They have never failed me. They have a very friendly staff, very knowledgeable mechanics great prices. I would highly recommend them to everyone.

  • ASE (Automotive Service Excellence)
  • Jasper
  • ASE Master Technician
  • BG Products
  • Rough Country
  • Car Care Aware
  • Call Us For Service: 540-628-0100