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A8 Overheats, A/C failing intermitently

Old 10-15-2012, 08:45 PM
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Default A8 Overheats, A/C failing intermitently

I have a 2000 Audi A8 w/ ~140k miles. It is now overheating on occasion, for example when stuck in traffic. When moving >25 mph it never overheats.

recently replaced serpentine belt, timing belt, water pump, thermostat, temp sensor.

A/C -- when idling at full stop (e.g. in a parking lot), the air stops blowing as cold, and within a minute, the air is completely warm...absolutely no A/C. Freon has been replaced, with dye, and no leaks detected.

As soon as I get moving again, the A/C turns cold.

I'm thinking these two issues are combined -- possibly the secondary fan is not working and/or the fan clutch is not working?

Thoughts?
Old 10-16-2012, 06:01 AM
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Your belt driven clutch fan has failed. If you can stop it with a pencil when the car is hot and running, then need a a new clutch.
Old 10-16-2012, 06:11 AM
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Will that thing seize up and take out the serp belt?
Old 10-29-2012, 11:34 AM
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thanks, fan clutch on order.
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