Working Hours
  • Mon 7:00AM - 4:30PM
    Tue 7:00AM - 4:30PM
  • Wed 7:00AM - 4:30PM
    Thu 7:00AM - 4:30PM
  • Fri 7:00AM - 4:30PM
    Sat Closed
  • Sun Closed
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724-349-6996 | 97 Sexton Rd, Indiana, 15701

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 Hammill's 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.


What Our Customers Are Saying

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Honest and great people

, 03/09/2024

Adventuring all of the time is a lot of ware and tear on a vehicle. I trust this auto shop as a frequent and returning customer. I never feel like they just **look for things** to charge me for. The pricing looks fair and honest on each receipt. The service is kind and inviting. Plus, they are very good at communicating with their customers. Thanks, Hammill's, for fixing up my ride so that I can continue on my adventures in a safe and reliable vehicle! (I own a 10+ y/o Toyota)

, 11/08/2023

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Great service as usual.

, 07/27/2022

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Always a good experience

, 12/01/2021

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Was very professional and very polite. Showed up when he said he would and was very reasonable with pricing. Will see use his service again. And also would refer others to him as well

, 11/27/2021

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Eric and his team have always gone abovs and beyond for me and my family. Great garage great service

, 11/26/2021

  • Jasper
  • IDENTIFIX
  • NAPA
  • AAA Approved Auto Repair
  • Interstate Batteries
  • Repair Pal Certified
  • Car Care Aware
  • Call Us For Service: 724-349-6996