785-357-7770 | 2647 SE 6th Avenue, Topeka, 66607
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
Smith Brothers Transmissions
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 Smith Brothers Transmissions, 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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Taylor Phelps , 03/10/2021
Our Buick Enclave all of a sudden would not start, we were able to get it started luckily, we dropped it off with them on a whim, they diagnosed the issue for us in a great amount of time, A++. Then the replacement of diagnosed part ( Starter ) was also done quick, we had minimal down time with our vehicle, this is also our primary family vehicle as we are a family of six and our other car is a small Ford Focus, lol. But overall great service and time, would recommend, and I have recommended. Oh! Let's not forget price. The cost of diagnostic and parts and labor, was definitely under expected price. I can usually do most maintenance on my vehicles, however electrical systems are the hardest to diagnose and I did think it was the starter, but didn't want to chase gremlins, and with proximity to the transmission and lack of equipment to lift vehicle, this would have been a headache for me, and was definitely worth the price. I won't give the price. You ask why? Well, you cannot compare, diagnostic time, work time, labor intensity all changes with each vehicle, which does include the same model and year. Our vehicle had no code, yours could, sometimes even with codes, the problem seen may not really be the problem, there could be ten things causing one thing to fail when it's actually fine. So, bottom line, if you have the time and money, sure, do it yourself. However if your like most people (like me) the benefit of time and accuracy definitely make the service here worth more than I paid. I may be returning for front suspension work, I could do it, but I'd rather spend my one day off with family. Also my history with vehicles is definitely not novice, I've worked on my father's drag car, I've done most maintenance on my own vehicles and have done oil, brakes, alternator, rebuilt carbs on older cars, replaced crankshaft bearings, harmonic balance. Rebuilt the top end of my 83 AMC eagle station wagon, bored my father's 82 power ram 50, replaced most of chassis on 67 cougar (frame has rust now -_-, ) so I'm no slump when it comes to mechanics, I just value family time!