Skip To Content

Best Auto Repair, Helena

1339 11th Ave Helena, MT 59601

406-442-7253
Opening 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 9:00AM - 1:00PM
  • Sun Closed
CONTACT US

406-442-7253 | 1339 11th Ave, Helena, 59601

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

Guaranteed Muffler

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 Guaranteed Muffler, 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

  • ASE (Automotive Service Excellence)
  • CARQUEST
  • TECH-NET
  • World Pac
  • BBB (Better Business Bureau)
  • Car Care Aware

Testimonials

They installed a new muffler in my old Subaru earlier this week. They called me to discuss and gave me a quote (only 99 dollars, including installation!) before beginning work and had my car done exactly when they said they would, which only took a couple of hours even though I did not need the repair done quickly. My car sounds great and I will definitely use them again.
view all reviews
TAP TO CALL NOW 406-442-7253 X