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 CARBMASTER, 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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Expert advice and knowledge, professional, courteous service! I would highly recommend Carbmaster to anyone needing their vehicle serviced! Our vehicle has never ran better since we took it to Carbmaster. Thanks for your outstanding service!
Had a great time working with Kelly.The man knows carbs..if you need it done right than its worth the wait...The man is busy so let him work,like I always say" you cant hurry a masterpiece"..He even offered to tune my rebuilt Holly after it was installed...Wow what service.If you had a bad experience I'm sorry,Patience is a virtue in my world.Cant wait to get my 64 T-bird rolling...Good luck in your car resto's...Thanks again Bro...