Working Hours
  • Mon 7:30AM - 6:00PM
    Tue 7:30AM - 6:00PM
  • Wed 7:30AM - 6:00PM
    Thu 7:30AM - 6:00PM
  • Fri 7:30AM - 6:00PM
    Sat Closed
  • Sun Closed
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443-837-0700 | 181 Defense Highway, Annapolis, 21401

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

Criswell Collision Center

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 Criswell Collision Center, 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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Always excellent service at Criswell. One of the best Audi certified centers in the area. Kurt did an awesome job of communicating and following up with me in regards to my repairs (even better than my own insurance!). Quick turnaround time. I highly recommend them!

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Kurt Thompson helped my husband and I with our A4. Very Polite courteous and professional. If you ever need any body work done, I recommend you see him.

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We recently took our new car to Criswell Collision after a head on collision with extensive damage. Kurt and his crew not only repaired the damage but improved the molding, door and trim gaps to better than the factory original. The paint was blended perfectly with the factory finish. Kurt somehow found a way to get factory parts when my insurance company wanted him to use recycled parts. I wouldn't take my car anywhere else in the future [hopefully never].

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My brand-new Audi Q5 had a small factory imperfection on the rear bumper that required the bumper to be removed, a small area repainted, and the entire bumper clear coated. Criswell Collision did an outstanding job. Vehicle was returned as promised. Many thanks to Kurt Thompson and his staff for a job well done.

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I had a terrific experience with Kurt Very professional and delivered the car early I had to turn in my leased car by the end of the month. Kurt said he would try and entire experience was superb

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Very simple process to getting your car fixed. Very quick given the difficulties caused by COVID-19. Everyone I talked to were very nice and thoughtful. Kurt did a wonderful job with communication and creating a friendly atmosphere.

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  • Autobody Alliance
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  • WMABA
  • Maryland Insurance Administration
  • SCRS (Society of Collision Repair Specialists)
  • I-CAR
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    Call Us For Service: 443-837-0700