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 Darrell's Auto Service and Towing, 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've been using Darrell's for 5+ years now. I wish I found them sooner! They're the best Auto Repair shop I've ever dealt with. They're reliable, trustworthy, VERY knowledgeable, and the entire crew are just "good people". They care about their customers and take an extreme amount of pride in what they do. Whether it's routine maintenance, or issues with your vehicle, you can absolutely TRUST they will do a great job. I have 3 children, with a couple older vehicles in the mix and they always make sure they're safe and road ready. For my newer vehicle, I'd been using a dealer for quite some time. After first going to Darrell's through a neighbor's recommendation, I found out the dealer wasn't providing nearly the same level of service that Darrell's does. They go above and beyond to make sure your vehicle is in the best shape possible. Thanks to Darrell, Chris, Leon, Lori and the entire crew!
I want to give a shout-out to Brian who towed my car last night during torrential rain. He was very kind and somehow got me in and out of the tow truck safely. I am almost 72, so this was not an easy feat. He also went beyond the call of duty and put my garbage bin and recyclable bin out near the road for pickup today. I can't thank him enough. And thank you for your service in the Navy.