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 Pelletier's 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.
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Celine Beaudry, 03/01/2021
Brought my Honda Civic to Mark Pelletier for new brakes, thought I needed front and back, turned out only front. Also lights on dash that were indicating problems. Happy to say he fixed all and my car is 100% in tiptop shape. Great mechanic, honest, reliable and you don't have to worry about being taken. My defroster was making a loud noise and could only bring it up a notch or 2. Thought the motor was gone, but come to find out it was chipmunks or squirrels making a surprise nest. Once again Mark cleared that up and it wasn't the motor after all. Saved me some money!! Oh and he has a great smile and is very personable and takes care of his customers. Thanks Mark! Highly recommend