Have fiat 500 by diesel 2010 engine fan not working overheats in traffic garage could not find any info on line to help diagnose need fuse relay - fan moves freely but does not come on when engine heats up air conditioning fan is working any advice can’t afford main dealer wants £120 to just look

Hello and welcome to the forum. Sorry to hear you've got a problem.

Several things it could be; blown fuse, burnt out fan motor (seen this one myself on a Mk1 Punto), faulty sensor, bad wiring connection are all possibles. A competent DIY mechanic or independent garage ought to be able to work through the possibilities without needing to go online.

Be very careful about driving the car if it's overheating; the 1.2 is very prone to head gasket failure if the engine gets too hot. If you absolutely have to drive it somewhere, then (1) drive slowly (2) put the heater on maximum heat and turn the cabin fan up to maximum and (3) turn the A/C off. Driving slowly minimises the waste heat generated by the engine and turning the heater up maximises the amount of heat extracted from the coolant. Turning off the A/C significantly reduces the amount of power the engine needs to produce (particularly in traffic) and thus reduces the amount of waste heat it generates. But do get it sorted as a priority as you risk destroying the engine by continuing to drive in this condition.

Finally I'd avoid that franchised dealer; wanting £120 just to look at it is well out of order.

My guess is a broken resistor (the top connector). Remove the power connection, remove the one small bolt holding it in and visually inspect it. Might be worth changing it. I had the same problem once. Changed it and it was fine.

Leave the ac ON this will at least help as the fan cycles often

Thank you for your help - took it to fiat garage this morning but they have no vacancies to look at it plus cannot do mot today (booked in for that) as overheating - bit like a rock and a hard place - I m driving as you say with all heater blowing - lovely in this 30 degree heat, thanks again.

Thanks - I’ll tell the chap at local garage who looked at it yesterday for an hour but could not find any info on. fiat 500 fan on internet this may help him. Thanks againFiat garage can’t fit me in.

Thanks John roasting n the heat but I’ve got it turned on full.