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  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
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402-734-3232 | 4005 S 42nd St, Omaha, 68107

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

Pitstop Automotive & Mobil Lube Express

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 Pitstop Automotive & Mobil Lube Express, 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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Over the years I have experienced everything from oil change scams to over tightened parts; over priced jobs....the list just goes on. Now I only take my car to a place the place where you get an honest and fair service. These guys know their stuff. Pitstop has always done great work. Thanks much

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These guys are amazing! Everyone really knows what they are doing and I never worry that they will try and fix something that doesn't need to be fixed. They have always been honest with me and take great care of me. :)

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Fast and friendly.... You can trust them to be dependable and honest, have always been treated right there.

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I have been a customer for years, they do top notch work and always with a smile!

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These guys are great! I found their shop on a list from NPR's Car Talk and it has certainly lived up to the reputation. My wife and I have taken our cars there for about 5 years and they are always honest, affordable and friendly. They won't hesitate to tell you if things don't need to be fixed (I've had this happen a couple times) or if a repair can wait for a bit so you can save up. I highly recommend!

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We have been going to Pitstop for seven years. Pitstop is honest and do a wonderful job. They will tell you what is wrong without trying to charge extra for things that don't need changed. As you become a regular they know you by name and take great care of your family and your vehicles.

  • ASE (Automotive Service Excellence)
  • NAPA
  • ASE Master Technician
  • Auto Value - CSC
  • BG Products
  • VP
  • MobilPhillips

    Call Us For Service: 402-734-3232