Best Auto Repair, Martinsville

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

Working Hours
  • Mon 7:30AM - 5:30PM
    Tue 7:30AM - 5:30PM
  • Wed 7:30AM - 5:30PM
    Thu 7:30AM - 5:30PM
  • Fri 7:30AM - 5:30PM
    Sat Closed
  • 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 Pro Automotive Inc., 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

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    I had the timing belt replaced on my 2009 Subaru Outback in late February at Pro Automotive. On 4/5/18, my car broke down on the highway as I was leaving Roanoke. It was towed to the closest Subaru dealer in Roanoke, where they determined that the timing belt had failed and severely damaged the engine. I contacted Pro Automotive the next day. They not only covered the cost of towing my Subaru in for them to inspect, but repaired my car at no charge to me when it was determined that the failure was due to a defective timing belt tensioner bolt. They also paid for my rental car while I was waiting to get my car back. It's back up and running like nothing ever happened. Fantastic service. I highly recommend Pro Automotive, and will definitely take my car back when it needs service again. Thanks, guys! You were great!

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    Jeff and his technicians took the time to point out why my vehicle needed the work it did and gave me advice on how to avoid the problems in the future. They are extremely competent and charge fair prices for all of their labor.

  • reviewicon

    Jeff and his staff have set a very high standard. I am pleased and confident that their work will always be 100%.

  • reviewicon

    Received great service. I called earlier that day to see if they could fit in a car inspection on a used vehicle we were thinking about buying. We waited less than 10 minutes before the mechanic came in to get us to show us problems/possible problems with the car. I'm so glad we got another mechanic to look at it instead of the mechanics at the dealership. We would have over paid for a car that I'm not even sure we want anymore. We are taking his advice and continuing our search for a car.

Call us for service: 276-666-2167

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