Air Conditioning problem
2001 Audi A6 6 cyl All Wheel Drive Automatic
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The air conditioning in the car works great when the car is moving, but as soon as I stop at a light or sit with car on the air slowly gets warm. What is causing it to do this and what do I need to fix?

The compressor needs to be checked with a set of manifold gauges, it's either low on R-134a, or the condenser up in front of the radiator, needs to be cleaned, or the compressor itself is weak! The gauges will tell which!