Working Hours
  • Mon 8:00AM - 6:00PM
    Tue 8:00AM - 6:00PM
  • Wed 8:00AM - 6:00PM
    Thu 8:00AM - 6:00PM
  • Fri 8:00AM - 6:00PM
    Sat 8:00AM - 1:00PM
  • Sun Closed
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937-848-3834 | 4370 W Franklin St, Bellbrook, 45305

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

Muffler Brothers Bellbrook

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 Muffler Brothers Bellbrook, 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 Our Customers Are Saying

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We have taken our vehicles to Muffler Brothers in Bellbrook, and in Franklin, and have always been taken care of well. Prices are very reasonable, and they don't try to add extra things they think should be done. I was particularly impressed on our most recent experience where we took our minivan in because the sliding door had come off the track, leaving the door slightly open. Friday afternoon they called us to let us know that they couldn't perform the repair. They had also seen that a thunderstorm was coming, and they have moved it inside so it wouldn't get wet. We were not able to pick it up until the next morning, and when we arrived they had it running to charge the battery since the light had run it down. They charged us nothing for this. My overall experience is that they really take good care of their customers.

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Best shop in the area! Quality work with quality technicians! Doug always gives the Best Prices in town!

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Best garage I've ever used. They always find the simplest, least costly fix. A dealer spent all day troubleshooting an electrical issue, didn't find the problem, and told me not only that is have to bring my truck back, but that they would likely need multiple days to find the problem. Muffler Bros troubleshoot it and fixed in one day for less than the dealer charged for not even fixing it.

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Great service, worked up an estimate for insurance work, made sure everything was covered, and made the repairs in a timely fashion.

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Fast great service great sounding flowmaster put on.

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This is the only car repair shop that you can trust, plain and simple. They treat everyone with respect and do not try to up-sell anything. I can also attest (on my wife's behalf) that they don't take advantage of female customers.

  • ASE (Automotive Service Excellence)
  • Jasper
  • BBB (Better Business Bureau)
  • Car Care Aware
  • Call Us For Service: 937-848-3834