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Robert, Peugeot Technician
Category: Peugeot
Satisfied Customers: 4708
Experience:  Fully qualified 19+yrs exp/self employed technician in the UK
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Cooling fan comes on at any time ie. when starting from

Customer Question

cooling fan comes on at any time ie. when starting from cold,starting from warm after standing.nothing on engine management,makes a hell of a noise,does not go off until car switched off,does not always come on,
no connection with aircon.Help
Submitted: 1 year ago.
Category: Peugeot
Expert:  Robert replied 1 year ago.


You mention the dealer..what have they done upto now or replaced to try and solve this?

Is the engine showing as overheating at cold?

is the coolant level ok at cold?

Customer: replied 1 year ago.
dealers done nothing,fan comes on when engine cold,early morning or when warm,levels ok,some times does not come on at all
temp gauge never above 90.
Expert:  Robert replied 1 year ago.

what engine size - petrol or diesel?

Customer: replied 1 year ago.
I must leave phone will contact next week.
Expert:  Robert replied 1 year ago.

I need to know what engine size you have? - petrol or diesel?

Customer: replied 1 year ago.
engine size 1.6hdi diesel
Expert:  Robert replied 1 year ago.


the reason the fans continually runs at high speed and any given time when the vehicles in use is because its no doubt in default fan speed..which means if a fault is seen on the temperature montioring side or fan control system its will run at the highest speed..but like disconnecting the coolant temp sensor the fan will come on automatically.....On "some" HDI's witha DPF "diesel particulate filter" the fans can be heard running during regeneration process and also too after the car has been switched off and can run for upto a max of 20-30minutes and its totally normal...In you case if it comes on during a cold start then it be looking at the possiblilty of a failed coolant temp sensor located on the thermostat housing or bad cooling fan motor resistor which is mountied on the fan shroud you se a 2-3 pin multiplug going to it and are quite common for failing and more than likely your problem..normally a good high end scanner can pick that as above those are usually the most common reason for the fan to run as it does..

Customer: replied 1 year ago.
Thanks, ***** ***** investigate asap
Expert:  Robert replied 1 year ago.

No..problem... Also please dont forget to leave a rating for me..much appreciated..