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This part basically manages the pressure in your AC system. It’s a little reservoir that allows for fluid expansion and contraction as the AC cycles on and off, and as temperatures change. It collects excess refrigerant as it expands, and then pushes it back into the system when needed. Think of it like a buffer, smoothing things out. It also provides a space for the system to breathe, preventing high – pressure buildup.
It sits within the AC system, typically near the receiver – drier or accumulator. It’s connected to the liquid line, which carries refrigerant from the condenser. It doesn't directly control cooling, but it allows the rest of the AC system to work properly and efficiently. If it fails, it’s usually going to impact the performance of everything downstream.
A failing expansion tank can cause all sorts of trouble. You’ll notice if your AC isn't cooling as well as it used to, or if it's cycling on and off rapidly. It’s kind of like a pressure relief valve; if it fails, the system could end up over – pressurized, which can damage the compressor – and that's a big, expensive repair. It acts like a shield for other more sensitive components. Over time, these tanks can develop leaks or become saturated with moisture, reducing their efficiency. We carry a good selection of these at Fixparts Online, and replacing it is a relatively straightforward job for a qualified technician. It’s one of those preventative maintenance items that can save you a lot of money in the long run.
Suitable for every driver: Expansion Tank (MPN 6C0816679) includes a 12-month warranty!
About Volkswagen
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