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  • 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
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978-365-3622 | 60 Packard St, Lancaster, 01523

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

Royal Auto Repair

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 Royal 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 Our Customers Are Saying

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John and staff are awesome. Had an exhaust problem that needed to be resolved and they jumped right on it. Could not be happier with the response and action taken to repair the problem and get me back on the road. Many Thanks!

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My father took all our vehicles here since I was a kid and I?ve continued the tradition to this day. John, Larry and now Bjarne are and always have been those local trustworthy mechanics you want to do business with. They fix in a timely manner, have been honest when it?s not worth fixing, and are always sure to do the job right. From fixing my car to providing tips and advice when I wanted to do it myself, these guys are the best. Always bring you car here!

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My Wife and I have been going to Royal Auto Repair for at least several years now. John has always been professional and is very knowledgeable about cars & trucks. We have always been treated well there and his honest no nonsense approach is refreshing. We look forward to bringing our vehicles in there regularly.

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John just replaced the engine on our 2004 Camry. He has taken care of our car for the last seven years and we could not be happier. We look forward to another 250,000 miles on our car!

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Great guys, great service, honest work. The kind of people you want to work with, you won't find a shop with guys as great as these any more

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Awesome repair shop!!!

  • ACDelco
  • ASE (Automotive Service Excellence)
  • IDENTIFIX
  • ASE Master Technician
  • AutoPlus
  • Monroe
  • Call Us For Service: 978-365-3622