207-942-4554 | 568 Hammond Street, Bangor, 04401
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Auto Radiator Services
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 Auto Radiator Services, 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:
Cyndi H., 08/30/2021
Two friends referred me to Harry Heitin Auto Repair for air conditioning service. I had an appointment with a Ford dealer, before speaking with Scott. Diagnostics alone, at the dealership, was going to be $150. The service manager did not know when the actual repair would be done. Scott got my vehicle in a few days after I called. I dropped my van off at 5 pm, the night before. At 10am, the next morning, my van was ready. Scott said he had seen the problem before and it was a relatively easy fix. The cost didn't even come close to what the dealer was going to charge me for diagnostics. Many thanks to Scott and his crew for their friendly, professional and reasonably priced service.