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 Tips Automotive Specializing In Cadillac Since 1976, 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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I have been taking my Cadillac to Tips for years and have had the best service ever. Mark the owner is very professional. I couldn't ask for more of a service center. He also has sold me cars. I would recommend Tips to everyone. He has been in the Southbay since 1976, so he must be doing something right!
Tips is by far the best! I recommend anyone looking for service to go here, amazing customer service, the owner Mark is one of the most honest and trustworthy mechanic's in the business, which is hard to find. If I could give more stars I would. He always takes great care of me and my car!