A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Thermostatic switch

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Old 05-24-2009, 03:04 PM
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Default Thermostatic switch

Trying to fix my AC unit. Determined so far that the problem is electrical. Where can I find the Thermostatic switch?

Jamie
2001 A4 1.8T
150,000km
Old 05-24-2009, 08:19 PM
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Outside temperature sensor G17 (according to Bentley) is "below front bumper,centre,behind lower grill".The service manual offers nothing else unless you have a VAGCOM. Shorting the leads on the sensor connector should get the AC to switch on. Or heat up sensor and see what happens. Failing that just buy a new switch.http://www.autopartsway.com/autopart....8%20L4~242240
Old 05-24-2009, 08:41 PM
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Behind the bumper, in plain sight.

8D0-820-535 is the factory part number with the wiring harness to plug it in.
Old 05-24-2009, 08:45 PM
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Why do people go so far out of their way paying even more, to avoid the dealer? Then they risk that the part is called "OE", but what they really get is a cheap Chinese knock off. Ask me how I know.

Not to mention the unconditional factory 12m/12k warranty that allows you exchange the part without hassle if it fails.

The only parts I get "after market" are Bosch original and no different from what the dealer sells. And I don't go random Googling either, I go with a known and trusted seller. Namely ones who support the forum.

Last edited by Nate (ETKA+Scumbag); 05-25-2009 at 10:18 AM.
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