Best Auto Repair, Millington

Financing through Napa
1905 Long Hill Rd Millington
NJ 07946

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908-647-7984

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Long Hill Auto Service

 (53 Reviews)

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 Long Hill Auto Service, 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.


Reviews

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Repaired my father’s Tacoma, work done well, truck runs great, also fast turn around time considering it needed a lot of work. Definitely recommend.

, 08/04/2025

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great place! accommodated what i needed done expeditiously!! thank you !

, 08/02/2025

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The owner is honest as the day is long. I brought my car in recently because of a dashboard light that said "AWD System Malfunction, 2WD Mode Engaged, Visit your Dealer." Scared the crap out of me. While I had used Long Hill in the past and was satisfied with their work, I wan't completely comfortable having them, as opposed to my "Dealer," address this issue. Long story short, the owner diagnosed it, told me it was merely a problem with the sensor on the dashboard (or something like that...I'm not too savy when it comes to auto repairs), fixed it, and charged me nothing. I'm now a customer for life!

, 07/14/2025

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