Working Hours
  • Mon 6:30AM - 6:00PM
    Tue 6:30AM - 6:00PM
  • Wed 6:30AM - 6:00PM
    Thu 6:30AM - 6:00PM
  • Fri 6:30AM - 6:00PM
    Sat 6:30AM - 2:00PM
  • Sun Closed
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706-278-6178 | 1817 S Dixie Hwy, Dalton, 30720

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

Harris Service 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 Harris Service 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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Had ac work done. The owner was honest and did great work. He also reached out to me a week later to see if there were any issues with the repair. I highly recommend this shop.

, 05/16/2021

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Gary and the guys here @ Harris Service Center are top notch! They really do know their stuff! Had an A/C problem on my Kia and was pushed around by other automotive centers until I visited Gary, Told him what was happening and in a matter of minutes he was on it! Had me in and out in less than 2 hrs, IMPRESSIVE! Please if you ever need anything done to your vehicle and don't know where to go! Go to Harris Service Center!! And see Gary and the guys! I HIGHLY recommend them!! Thanks again for your 5 star performance! You all really know what it means to be in the business!!! Thank you!!

, 07/15/2020

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Driving through Georgia on our way home from Florida we ran into car problems and ended up stopping in Dalton, we found Harris service center by chance, Very friendly & extremely professional, great service... highly recommended!

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Great folks. Good repairs at great prices.

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Great service every time and they are always professional. Never had to bring my car back. They always fix the problem.

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Always get quick and helpful service here with good pricing.

  • ACDelco
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  • Call Us For Service: 706-278-6178