volvo overheats unless air con is on?

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Post 803488 by bonnietiler on 2016-07-29 13:46:17

My mate Bobbie has an 850 and it is brilliant but it overheats at tickover unless the air conditioning is switched on? He's coming round tomorrow as he thinks that I know what I'm talking about...ahem... come on guys save my bacon here. Any ideas?

Post 803490 by jamesy12345 on 2016-07-29 16:08:48

On most cars switching on the AC also switches the radiator fan on, so whatever controls the cooling fan normally must be buggered http://www.volvotips.com/index.php/850-2/volvo-850-s70-v70-c70-service-repair-manual/volvo-850-engine-cooling-fan/