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
  • reviewiconAmazing Service
    Car & Truck Care, near Chattanooga, Tennessee
    , 02/04/2020

    These guys bent over backwards for us. We were out of town and on our way home from our Florida vacation. We broke down 5 miles into our second day of travel on a Saturday. They were one of the few places open. They got us in pretty quick, they were very nice and very knowledgable. They got us diagnosed, showed me exactly what was going on and got our car fixed faster than they thought they would be able to. I appreciate everything they did to get us back on the road as quick as they did. Thanks to Maxi Auto Service Center, we were able to get home with only a few hour delay. Thank you very much guys!

  • reviewiconAmazing Service
    Car & Truck Care, near Chattanooga, Tennessee
    , 05/22/2019

    I would like to say that I have had a great experience. Going to Maxi Mufflers on Broad Street. The manager was very nice, courteous and professional. I would recommend anyone that needs muffler repairs to come by.

Chattanooga
  • reviewiconRecommended Auto Shop
    Brakes, near Chattanooga, Tennessee
    , 08/08/2019

    We have been there twice now and gotten exceptional service each time. Got right to it and didn't have to wait long at all. Very friendly staff! Highly recommended!!!!!

  • reviewiconRecommended Auto Shop
    Brakes, near Chattanooga, Tennessee
    , 06/19/2019

    SO SO KIND. At my emissions testing, I was told that there was a problem with my car (diagnostic plug unattached). I went to MAXI to have them check it out. George came out in the cold rain with me to look at my car. Back inside, Stephen explained clearly to me what the problem was. He said it was really only an aesthetic issue, and that it wouldn't be worth the money to fix. Both men were kind and patient, and I wasn't charged for an unnecessary fix! I am VERY satisfied by the service and care I received at MAXI.

Chattanooga
  • reviewiconHonest Repair Shop
    Undercar Services, near Chattanooga, Tennessee
    , 01/14/2020

    From the very first and the second phone call a few minutes later Steven was very polite and cordial. I had a loud rattle in my car and couldn't figure out what it was. Within 45 minutes they had test drove it, found the problem and fixed it. Turns out it was a bent piece of metal on my undercarriage hitting my exhaust which was caused by yours truly and they took great care of me. I will definitely be back and make sure my wife comes here as well.

  • reviewiconHonest Repair Shop
    Undercar Services, near Chattanooga, Tennessee
    , 02/04/2020

    These guys bent over backwards for us. We were out of town and on our way home from our Florida vacation. We broke down 5 miles into our second day of travel on a Saturday. They were one of the few places open. They got us in pretty quick, they were very nice and very knowledgable. They got us diagnosed, showed me exactly what was going on and got our car fixed faster than they thought they would be able to. I appreciate everything they did to get us back on the road as quick as they did. Thanks to Maxi Auto Service Center, we were able to get home with only a few hour delay. Thank you very much guys!

Call us for service: 423-265-0834

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