Cooling Fan

[Guest jp101]

I bought a 05 c5 1.6 hdi. The cooling fan is on after only driveing only 3 miles off normal driveing it can stay on from 2 - 8 muinets after stoping temp hand is normal, it usaly dose this 3 times after other and then not for a week again. It dose not matter if aircon is on or of. did not take it to garage because it will not do it when you want it to do it. any ideas

[davidad]

My wife's Peugeot 307 1.6Hdi does the same. The garage suggested it was to do with the particulate filtration system.

[Ronin]

Yep.... try bleeding the coolant system. Irregular operation of fans can be for two main reasons : air in the system or faulty temp senders etc.

There will be what looks like a tyre valve dust cap on one of the coolant hoses usually at its highest point. Open the coolant filler cap when its cold and start the engine with this dust cap open, let the engine tick over. keep an eye on the fluid level , don't let it drop below minimum(have a jug of water handy).

When the engine has warmed up you will start to see the coolant start coming out the valve in drips and drabs, like it's spitting. once it is flowing freely use a cloth to avoid scalding and re-tighten the valve up.

If it flows freely pretty much right from the start it will possibly be an electrical issue with a contact / temp sensor for the fan or radiator. Most motor factors can order these in quite cheaply and they aren't difficult to replace.

A decent garage can do all this is 30 minutes or so if you aren't mechanically minded.

 

It does sound more like a faulty sensor but I would bleed it first to make sure as its free to do and quite easy.

[Guest jp101]

Yep.... try bleeding the coolant system. Irregular operation of fans can be for two main reasons : air in the system or faulty temp senders etc.

There will be what looks like a tyre valve dust cap on one of the coolant hoses usually at its highest point. Open the coolant filler cap when its cold and start the engine with this dust cap open, let the engine tick over. keep an eye on the fluid level , don't let it drop below minimum(have a jug of water handy).

When the engine has warmed up you will start to see the coolant start coming out the valve in drips and drabs, like it's spitting. once it is flowing freely use a cloth to avoid scalding and re-tighten the valve up.

If it flows freely pretty much right from the start it will possibly be an electrical issue with a contact / temp sensor for the fan or radiator. Most motor factors can order these in quite cheaply and they aren't difficult to replace.

A decent garage can do all this is 30 minutes or so if you aren't mechanically minded.

 

It does sound more like a faulty sensor but I would bleed it first to make sure as its free to do and quite easy.

Just to let you know i bled the cooling system there was no air in it. The fan is not on as often as it was when i got the car in march. it can go two weeks without doing it. once it dose it, it will stay running 3 times, would a faulty sensor be so regular, thank you.