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 DG's Tire & Auto, 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:
I have always been the gatekeeper of vehicles and have always used independent auto repair services. Of all the auto repair service places I have used, D&G Tire and Auto is the absolute best. Dennis and his brother are honest, fair, and perform excellent work. They never try to "sell" you on repairs that are not needed or don't immediately need to be performed. They talk to you in a kind and informative and respectful way. I would HIGHLY recommend them to anyone. You will be very happy.
Honest and trustworthy. Two qualities that are hard to find these days. My vehicle has quite a bit of miles on it and destined for things to go wrong. I will drive a half an hour just to bring my car to DG's. I am a single lady with no automotive experience and would typically be the classic 'easy target' at many automotive repair shops. Dennis never tries to sell me things that I don't need, and I appreciate that more than anything. I value his kindness and professionalism. I get great service at a fair price, and my car is finished the same day. I drive away feeling like I got my money's worth. In my opinion, DG's Tire and Auto is by far the best around!
Dennis and the team are flat awesome. They are flexible, affordable and trust worthy. He worked in my truck on a Saturday and quickly and professionally did my breaks in a few hours. I trust him with all our vehicle needs and will be a repeat customer from now on. Five stars.
This is the best automotive shop I could ask for. They know who I am every time I call, their work is top of the line and their prices are even in budget for a single mother of 2. I had them find me a new engine after Wal-Mart messed mine up and my car has never run better. I go there for every issue I have no matter how minor and they always know just what to do and I am not paying an arm and a leg. As long as they are here they will have my business and anyone else that I can convince to go. If you try them once you will keep going back.
I must say what a great pair of guys . They have been my sole mechanics since 2008. All three family vehicles have been there for various problems. He does everything from bulb replacement to transmission replacement . Love him not trying to sell me a new air filter with every oil change !!