Working Hours
  • Mon 7:00AM - 5:00PM
    Tue 7:00AM - 5:00PM
  • Wed 7:00AM - 5:00PM
    Thu 7:00AM - 5:00PM
  • Fri 7:00AM - 5:00PM
    Sat Closed
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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

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

The quality of work at Scholls Ferry Automotive is only surpassed by the integrity of the ownership. I trust Chris more than I would more than almost I've ever met. Outstanding man, great business. I go out of my way to get service done there.

, 03/08/2022

Chris was great! I took my 2007 Lexus is350 in for them to check where my oil leak is coming from, and they found it they steamed cleaned it and everything. I got it back the next day they told me how much the repairs would be. Honestly for my first time going there it was great! Gonna take it back this week or sometime next week to get my leaks fixed!

, 06/20/2022

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Chris and his team are the best. I connected with Scholls Ferry Automotive when I attended an early morning business network meeting. I trust Chris and his team. I will be bringing my car in soon for my maintenance checkup. Happy weekend!

, 05/07/2022

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New to the area and was having trouble with my Jeep. Chris was easy to work with and found the problem and it was fixed. They're very reasonable with charges and even when there was a warranty issue with the part, they were on top of it and fixed it. Definitely a trustworthy mechanic shop!

, 04/26/2022

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The people here are amazing and very kind! The staff is super friendly and very professional!

, 04/13/2022

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Hands down the only mechanic I'll go to. Amazing and quick work fixing my Xterra and my mom's bug. You guys rock

, 04/07/2022

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