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The cooling fans on my 156 tend to turns themselves on at idle when the A/C is switched on, even if the temp gauge is showing nowhere near 90deg. The fans will then turn off straight away if I turn off the A/C button.

Was wondering if this is normal behaviour? It's a bit puzzling as the fans behave normally when the A/C is off (i.e. they swich on just over an indicated 90deg), making me think that it's not a rad problem (I'm not seeing over heating), but could be some sort of electrical/sensor problem?

I've checked the water temp sensor reading in Alfadiag and although the gauge is reading less than the actual temperature everything looks ok.

Car is idling a bit rough in general at the moment and am wondering if this is somehow related :confused:

cheers
Gav.

EDIT: Title should be "cooling fans"..
 
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That fan operation is perfectly normal but if you want to pm on the rough idle as this can be skipped cam belt on the v6 but you can nearly tell from the smell of the exhaust....
 
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