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 Niel's Auto Service, 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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Neil’s Auto Shop is truly one of those rare gems you wish everyone knew about. Neil has been in the business for over 25 years, and what makes him stand out isn’t just his experience, but his incredible humility and dedication. Even as the owner, he’s there every single day, working hands-on and treating every customer like family. I first found Neil 10 years ago when I needed help, and he came through for me without hesitation. Fast-forward to today even though he has moved but I will still go to him! I still call him because I know there’s no one else I’d trust. Neil is the definition of honest and reliable. He never price gouges, always explains everything clearly, and truly cares about his customers. As a woman, I’ve always felt completely comfortable and safe in his shop, knowing he would never take advantage or recommend something unnecessary. He works with integrity, kindness, and a commitment to doing things the right way every single time. If you’re looking for a mechanic who’s not just talented, but genuinely cares about you and your car, Neil is your guy. It’s so rare to find someone like him these days and once you do, you won’t go anywhere else! Neil’s Auto Shop isn’t just a place to get your car fixed; it’s a place where you’re treated with honesty, respect, and old-school heart. Highly recommend to anyone who wants quality work from someone who truly stands behind what he does. Thank you, Neil, you’re the best!