haribo

C 180 fan keeps on running and starts up as soon as you switch on basically on all the time noisy !! Any ideas ?

Glyn M Ruck

The fan should always run if the AC is turned on but not at high speed unless hot.

Has the car just started doing this? You really need to run a fan simulation with a Star. The fan controller which is on a fly lead from the fan might be toast. If so you need a new fan assembly. Controller is not available separately.

Does your AC work properly & is your temperature gauge working normally? Both temperature sensors can effect fan behaviour.

haribo

Both ac & temps seem ok but fan has been running at high speed for over a year with a short spell of not running at high ! but only for a matter of days ! Merc dealer siad I would possibly require a new fan ? But it's working so why renew it! Albeit noisy.

Glyn M Ruck

Sounds like a fan controller problem. The fan running flat out would drive me nuts.

haribo

Cheers Glyn ! Well done in the rugby ! Allan from Glasgow .

Glyn M Ruck

Thanks Bud!