If you take it to a dealer than has the diagnostics box (or have your own one like I do x), there is a test routine to check if the fan circuit is working properly... I forget the code number off hand (I'm not that much of a nerd), but you tap it in, and the fan should go through a cycle to show its working properly - if it isn't, it flags up a fault code...

Gotta love technology!

Jx

ps. if it is a friendly 'local' dealer, they might even do it as a favor - it takes less than 2 minutes to check...

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