Working Hours
  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
    Sat Closed
  • Sun Closed
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301-829-6100 | 1006 Rising Ridge Rd, Mt. Airy, 21771

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

Twin Ridge Auto and Light Truck Service

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 Twin Ridge Auto and Light Truck 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.

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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We have had Scott and Earl work on our cars for over 20 years. They helped us get 430K out of our Toyota Echo before the A/C failed and it just didn't make economical sense to repair. We know they will always give us an honest opinion on what needs to be done and charge a fair price. They are a pleasure to work with.

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Scott, Eric and the gang are a good bunch to work with. Having worked in the industry myself for a number of years, I know when a shop doesn't have it's stuff together. They are honest and do a good job.....what more could you ask for?

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Trustworthy, kind, and fair. What else could you want or expect from your mechanic? We wouldn't take our cars anywhere else.

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Great service and I can trust them with my car. Highly recommended.

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Very pleased with the work that Twin Ridge Auto did on my wife's minivan. The communication was excellent and the speed of the service exceeded my expectations!

  • ASE (Automotive Service Excellence)
  • IDENTIFIX
  • IATN (International Automotive Technicians' Network)
  • NFIB (National Federation of Independent Business)
  • BG Products
  • Amsoil
  • BNI
  • Mastercraft Tires
  • Mt Airy Chamber of Commerce
  • Car Care Aware
  • Call Us For Service: 301-829-6100