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 Sparks Computerized Car Care, 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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James Teele did a great job quickly Mike Lance, 04/21/2025 |
I took my old 2007 dodge Dakota in for a problem with flickering lights when the ignition was off. The office personnel took his time to gather a mechanic and evaluate the situation. I’m thinking hundreds of dollars to fix and this and the mechanic diagnosed the the problem with minimal pressure on my wallet. They have Done a phenomenal job on all my repairs. Patrick and all personal have treated me fair. Terry Burk, 04/18/2025 |
Sparks delivers excellent service professionally done! Ted M., 04/17/2025 |