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 Williams Automotive Inc., 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.
More AC Repair Services:
My truck's water pump gave out, and the serpentine belt flew off on the highway. I had my insurance company tow it to Williams Automotive Inc. I spoke with Jeff, and he informed me of what the damage was. He gave me a best and worse outcome for the fix. It has been my experience that when you are given two options of what may happen from an automotive shop, it's usually the more costly repair that you get to deal with, according to them, when they get back to you about it. However, surprisingly, Jeff got back to me via text with a picture of the object in question and informed me that the cheaper fix will do. I was shocked to say the least, and definitely happy about the good news. I believe they did excellent work, and gave me excellent customer service at a reasonable price. Would not hesitate to go back if/when needed.
10 out of 10 as always. The mechanics do great work, no one tries to up sell you on anything. If a new or potential problem is discovered, while your car is being repaired for the original reason it's being worked on, NO additional or surprise repairs are done without the customer's approval first. Customer service is top notch, always professional and courteous, and the customers are always greeted like family. We will not take our vehicles anywhere else.
Fair, honest, and good to deal with. They could be a bit faster on getting parts, they could be located better. But really in spite of those two things there is no one I would rather trust with my cars. I tried someplace else just to be closer to the hose. That was a huge mistake.
These guys are AMAZING!!!!! They will treat you like family and as if your car was their own. They don't upsell you on anything. They just tell it like it is, and get straight to the point of your problem. They're thoughtful, kind, generous, and they know what they do and do it well. I HIGHLY RECOMMEND them!!!!
These guys are AMAZING!!!!! They will treat you like family and as if your car was their own. They don't upsell you on anything. They just tell it like it is, and get straight to the point of your problem. They're thoughtful, kind, generous and they know what they do and do it well. I HIGHLY RECOMMEND them!!!!