For the protection of our customers and employees, we are following all COVID-19 CDC guidelines, in addition to wearing masks, and utilizing wheel, seat and gear shift covers. At Maxi Auto Service Centers, our goal is to ensure your health and safety.

Best Auto Repair, Chattanooga

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

Working Hours
  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
  • Wed 8:00AM - 5:00PM
    Thu 8:00AM - 5:00PM
  • Fri 8:00AM - 5:00PM
    Sat 8:00AM - 3:00PM
  • Sun Closed

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 Maxi Auto Service, 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 People Say About Us

Chattanooga
  • reviewiconProfessional Mechanics
    Car & Truck Care, near Chattanooga, Tennessee
    , 02/04/2020

    As always these guys took care of my car repairs. It's hard finding mechanics you can trust because most will tell women anything. Not here. They are honest and trustworthy. Thank you again!

  • reviewiconProfessional Mechanics
    Car & Truck Care, near Chattanooga, Tennessee
    , 07/25/2019

    Awesome shop! defiantly the best Iv been to. Ron is very nice and they seem to do quality work and actually want to take care of their customers. highly recommended!

Chattanooga
  • reviewiconLocal Mechanics
    Undercar Services, near Chattanooga, Tennessee
    , 02/12/2019

    Honest mechanics, good service and always get my car done in a timely mannered. I only trust my car maxi muffler if I need service on my car. Been going to them for years.

  • reviewiconLocal Mechanics
    Undercar Services, near Chattanooga, Tennessee
    , 11/07/2019

    Love this shop. I've been using them forever, and they've always done good work. They also beat everyone else's prices. Honest mechanics, what more can I say?

Chattanooga
  • reviewiconFriendly Staff
    Car & Truck Care, near Chattanooga, Tennessee
    , 08/19/2019

    I was coming into town when my car was breaking down and a trusted local recommended this shop, specifically Ron. These guys knew they couldn't fix my car in the timeline I provided, but they told me the truth, told me what I needed, and were honest in their assessment of next steps. Without hesitation I very highly recommend this shop, these gentlemen, and Ron's honest way of conducting business. If I were in the area with a car issue, I'd go no where else. Even when I took my car elsewhere (solely because it was a Sunday) they didn't find what Maxi did. Look no further, go nowhere else, these guys are the best. THANK YOU to Maxi!

  • reviewiconFriendly Staff
    Car & Truck Care, near Chattanooga, Tennessee
    , 02/04/2020

    As always these guys took care of my car repairs. It's hard finding mechanics you can trust because most will tell women anything. Not here. They are honest and trustworthy. Thank you again!

Call us for service: 423-894-8699

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