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 Evans Automotive & Tire Center, 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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What Our Customers Are Saying

Had a great experience with Evans Automotive in St Augustine . I originally went to Hanania Jeep (huge mistake)in town, because Evans Automotive was closed for Christmas and I was desperate. Hanania quoted me $1300-1600 for ignition and new keys ( keys weren't needed). I felt very pressured there and left, and waited for Evans to reopen. Evans repaired my 2016 Jeep for $596. The service was excellent, with no pressure. They did only what was needed and no upsell. Evans stands out for their integrity, great service and high quality work. I highly recommend them to anyone needing reliable and affordable repairs. ( If they happen to be closed, just be patient because it's worth the wait :))
Very honest and transparent, called and immediately was taken care of, gave me a free brake inspection and they put on my tires that I didn't buy through them and took care of a full brake service! Dropped off at 11:45 am on a very busy Monday and had my car ready before they closed. Very happy with the job they did and I will definitely be back.
Quality service and great communication! Hard to find quality service with great communication and these guys are great at both! This is a business I trust and would highly recommend.
Make em sing that song run run Rudolph Santa got make it to town in there head that song will be





