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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 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 Hill's Auto Repair, 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
    , 05/26/2023

    Everything went very well!

  • reviewicon
    , 05/16/2023

    I've used Hill's twice now and both times they met or exceeded my expectations.

  • reviewicon
    , 05/02/2023

    Been using these folks for years and highly recommend them.

  • reviewicon
    , 04/25/2023

    Professional, knowledgeable, friendly, fair pricing. Good place for all automotive needs.

Mechanicsville
  • reviewicon
    , 04/14/2023

    Very professional and precise as to making sure the work was complete and satisfactory to the customer!

  • reviewicon
    , 04/14/2023

    I brought my 34' travel trailer in today to have tires mounted. I tried about six other places in Mechanicsville before I called Hills, and all of them did not want to do the work. From the minute I stepped in the lobby I was treated like family , what a great bunch of folks! From the fella that checked me in to the young lady that cashed me out, all excellent! The tech that installed the tires (Benny) started the job at 9Am, exactly the time my appointment was set for and finished at 10-10:15. Benny was very courteous and also helped me find a burnt out fuse on my truck after he installed the tires. In this day and age it is hard to find people who will go out of their way for others and they do exactly that at Hills Auto! They have gained a customer for life with me as I have never in my life had such wonderful service from an automotive repair shop! Keep up the great work!

Call us for service: 301-769-2400

ASE (Automotive Service Excellence)
IATN (International Automotive Technicians' Network)
Jasper
NAPA
BG Products
Amsoil
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