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 Rev Auto & Truck 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.
What our clients are saying about us
We have established longterm and stable partnerships with various clients thanks to our excellence in solving their automotive needs!
The owners and operators of this place deserve the world. I failed my emissions test yesterday and was originally quoted at $200 for inspection. The inspection went much more quickly than expected and they were able to fix the issue with very little effort. They ended up not charging me a penny because it was such an easy fix. I am immensely grateful to Liz and Mike for saving me an anxiety inducing expense. Unmatched customer service, truly!
I had my 2022 F-150 inspected at Rev Auto after purchasing it, and this was one of the best experiences I’ve ever had with an auto repair shop. The service advisor Liz was friendly and knowledgeable, and she did a great job of explaining everything in a way that helped me make informed decisions. Their inspection was incredibly thorough. They documented everything with photos, took a sample of my transmission fluid before recommending service, and even gave me an honest assessment of the truck’s undercarriage and light surface rust. At no point did I feel pressured into unnecessary repairs. Instead, they took the time to answer my questions, explain their recommendations, and help me prioritize maintenance. What impressed me most was that they actually talked me out of a more expensive transmission fluid because it wasn’t necessary for how I use my truck. That level of honesty is rare. It’s hard to find a shop that combines technical expertise with integrity and excellent customer service, but I think I found one. Rev Auto has earned my trust, and they’ve definitely become my go-to shop for my truck. Highly recommend.
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