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Best Auto Repair, Southwestern New Hampshire

JS Automotive - Charlestown
892 Old Claremont Road Charlestown, NH 03603

(603) 826-4622

JS Automotive - Walpole
538 Main Street Walpole, NH 03608

(603) 904-4130

JS Automotive - Grantham
86 Route 10 South Grantham, NH 03753

(603) 843-8303

JS Automotive - Newport
472 Sunapee Street Newport, NH 03754

(603) 863-3101
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 Closed
  • Sun Closed
CONTACT US

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 JS 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.

More AC Repair Services:

Truck and Car AC Repair Services

Freon Recharging Services For Your Car Or Truck

AC Evaporator Services

  • Car Care Aware

Testimonials

, 05/18/2020
Sara was a pleasure - very friendly and communicative. They fixed my car and came in way under the number they initially wuoted me, which was reasonable to begin with. Could not recommend higher.
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