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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  • Chattanooga, TN Auto Repair Shops


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

  • reviewicon
    , 07/07/2020

    Honest and reasonable. Fast and friendly. Did a great job on my vehicle. Will be back for all my vehicle maintenance and repair.

  • reviewicon
    , 07/07/2020

    I started taking my daughters car here after a horrible experience at Firestone down the road. They have been honest and straight forward with us. They made my daughter feel as if she could trust them and their work over the other repair shops around. Keep up the great work!

  • reviewicon
    , 07/07/2020

    Both of my children attend UTC. Any time there is an issue with one of their vehicles I have to deal with it remotely. Every time the team at Maxi has taken care of them without question and given us fantastic service. It is hard to find someone who you feel you can trust to do the right thing and treat young customers with professionalism and respect. I recommend the team at Dayton Blvd without question.

  • reviewicon
    , 07/07/2020

    I live in central Florida and my son attends UT Chat. He needed some immediate muffler repairs on his truck and as a college kid, he was clueless who to take it to. I found Maxi on the web and read excellent review after review so I sent my son in. I called ahead and spoke with Steve who was extremely kind and very professional. They did an amazing job with honesty and integrity being first at hand. Thanks Steve!! I would definitely recommend this business if your are seeking quality, honest, and professional service.

  • reviewicon
    , 07/07/2020

    Maxi was professional and repaired my vehicle in record time! More importantly, they were honest with me about the work needed and the cost beforehand.

  • reviewicon
    , 07/07/2020

    Had to get some work done on my car. The mangers there were very helpful and knowledgeable about what needed to be done. I would definitely recommend this place and I am going there whenever I need my car fixed again.

Call us for service:

ASE (Automotive Service Excellence)
Jasper
AutoPlus Professional Service Center
Better Business Bureau
Nexen tires
Magnaflow
Monroe Shocks and Struts
Flowmaster
  • Car Care Aware