Skip to main content
Interior_picture

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 Lunar Low Automotive, 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.


image-people-driving

OUR REVIEWS

 (107 Reviews)
image-quotes
reviewicon

Not only are they professional, but they are knowledgeable, fair, and Honest! Hard to find these days. They also do great work - highly recommended!

, 03/29/2024

join our team

We are currently on the lookout for the following:

  • ASE Certified Technicians
  • General Service Technician
  • Master Technicians
  • partners

    Dynatrac
    Fusion4x4
    ORI
    King Shocks
    Rock krawler
    Advanced Adapters
    Genn Right
    Currie
    Rock Jock
    Rugged Ridge
    East Coast Gear Supply
    Rough Country Suspensions and Lifts
    Rusty's Off-Road Products
    Clayton Offroad
    Tom Wood's Custom Drive Shafts
    Skyjacker Suspensions
    ATD - American Tire Distributors
    Fuel Wheels
    Dub Wheels
    Niche Wheels
    US Mag Wheels
    PSC
    Car Care Aware