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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 Hale's Diesel & Auto Repair, 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.

Contact Us Today!

Got questions? We've got answers! Drop us a line, give us a call, or even stop by. Our team is eager to help you with any auto repair needs you have. Let's get you back on the road safely and swiftly!

What Our Customers Are Saying

The best service, hands-down. Customer care was top notch, and they got my Yukon fixed up quickly. They were so much easier to work with than the dealership.

, 11/26/2025

Well, where to begin. We all work in WTX for a reason, and we put some pretty heavy wear and tear on our trucks. Some trust the 5 minute lube guys, or the truck house. End of the day I don't. I was pointed in Hale's direction and will NEVER search for another crew. They gave me my twice look over and showed me what they saw, was wrong, was possibly going to go wrong, what level of seriousness. They worked with me, we talked pros and cons. They made some valid points even if i didn't want to hear them, because i know they are right! Got my truck back, clean, Quality Checked, bottle of water the works. So excited to get the truck back. The next day, alas, i had a small problem. The owner reached out to me, the service writer reached out, mind you this was before the sun even came out. They got me lined up with a tow from my house to the shop. Put me front of the line. They made sure i had transportation to and from everything i needed. Offered a truck to use if i needed. Had my truck up and running 24hrs later. The truck back to full life, shining and sparkly and roaring strong. I CANNOT say anything bad, they took initiative, they were calm and cool not pressuring me into anything. Small hiccup that could have changed the course of my feelings (probably not though, because things happen) At the end of the day in WTX where Service Quality and Customer service are severely lacking in every industry. Jason, Jesse and that team went above and beyond! They got me hooked and i won't accept any service less than what they produced in West Texas! Thanks again Hale's Team

Midland, TX

, 11/05/2025

Excellent service and pricing! Will definitely be back!

Lubbock, TX

, 11/03/2025

Owner personally went to pick me up in his personal truck so I wouldn't have to waste money on a taxi . They diagnose your vehicle and give you the option to approve whatever repairs you want to get done. When I picked up my truck after repair was done I had a cold Gatorade and water in the center council. They vacuumed truck and cleaned all the windows. Very impressed with their service. I'll definitely go back..

Big Spring, TX

, 08/13/2025

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