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 Classic Coach Auto Body and Restorations, 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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Earlier this month I met with the owner of Classic Coach Restoration (Sam Jordan) about repainting my 1988 BMW 325i. As part of the experience, Sam showed me around the shop and said he values customer relations, quality work, and strives for excellence above all else. His goal he says is to satisfy every single customer...every time. True to his word, Sam delivered outstanding results and exceeded all of my expectations. I'm very satisfied. Rates are fair and competitive. Turnaround time will vary depending on the amount of work. If you're looking for an honest company that prides itself on absolute quality then look no further.
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