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 Marty'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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Nick Flintosh, 05/09/2024While my story is still in progress, I want to say that the positive reviews regarding Marty's professionalism and excellent effort level are absolutely totally earned. Marty took my vehicle in, had a diagnosis in 24 hrs, and communicated quite a bit of info to me clearly and respectfully about the repairs needed. Because an extended warranty is involved Marty even sketched out his best and worst case scenarios, but still took on the heavy lifting of making the calls, etc. This level of personal effort for a new customer demonstrates that this man is operating a business based on a personal committment to giving one's best honest effort just because it's the right thing to do, and that is exemplary! My journey is still in progress due to roadblocks beyond his control, but throughout Marty has been the consumate courteous professional the likes of which are rarely found. This may well be one of the stories he describes starting with "You wouldn't believe what I had to go through ....", but mine starts with "I can't believe what this man is doing to help me get through this..." Rock on Marty and staff!