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  • Mon 7:00AM - 5:00PM
    Tue 7:00AM - 5:00PM
  • Wed 7:00AM - 5:00PM
    Thu 7:00AM - 5:00PM
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503-246-9781 | 6600 SW Scholls Ferry Road, Portland, 97223

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

Scholls Ferry Automotive

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 Scholls Ferry Automotive, 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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Honest and reliable. Need I say more?

, 09/03/2021

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Kris and his guys are great. Did a detailed analysis, gave me a quote before any work was done, and did the work quick, providing all details on what was done as well as recommendations for further work they could not do. Will be my go to from here for all we need.

, 07/09/2021

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These guys did some serious work on my car and solved a problem that the dealer couldn?t, in good time and at a fair price. Great service too.

, 06/29/2021

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Awesome service and friendly staff!!

, 06/16/2021

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They did a pre-purchase inspection on a used vehicle I was considering purchasing, and saved me THOUSANDS in repairs!!! I passed on the vehicle, it's still listed for sale even with all the issues it has, buyers beware!

, 05/25/2021

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Finally a mechanic I can trust. I've been through a lot with my car lately and ultimately found out that it had multiple issues. Chris and the rest of the team were great the whole way through. They communicated with me clearly about pricing, timing, and the work they were doing. I won't bother with any of the other mechanics ever again.

, 04/12/2021

  • ASE (Automotive Service Excellence)
  • Jasper
  • TECH-NET
  • AAA Approved Auto Repair
  • ALL-DATA
  • NATA (North American Towing Academy)
  • Mitchell1
  • Napa
  • Orego DEQ
  • Car Care Aware
  • Call Us For Service: 503-246-9781