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
We have been using Long Hill Auto Service for over 20 years and Bob the owner and his staff are the best in the business. Not only are his mechanics superior if you need a loaner care Bob will have one for you. Any time I've called I don't think the phone rang more then twice before someone picked up the phone ready to help. I usually will keep a car for a good 10 years and that's because the mechanics there do the job right the first time and I have peace of mind knowing my cars are in good hands Don Marvel, 05/07/2025 |
I was referred to Bob at Long Hill Auto 20 years ago and because of his great group of mechanics and Bob's personal attention to detail have referred others to him. I like to keep my cars 10 years plus and because of how well his guys take care of my cars I certainly have peace of mind knowing I'm in good hands. The first thing I noticed 20 years ago was how clean his shop was and how helpful his mechanis are...I would say "The best shop in town"!!! Don Marvel, 05/08/2025 |
New to the area and my car was acting funny found this shop Online and All reviews seemed too good to be true but had the best/constant reviews in the area .. let me say they exceeded my expectations during a stressful time with my vehicle and the amount of professionalism and courtesy from Bob and the team was above and beyond made me a customer for life no doubt about it .. bob is straight forward no b.s for any car needs please check out long Hill auto service you won’t regret it -Jonathan m Jonathan, 01/21/2025 |