i just picked up a 2003 L&K 1.9 TDI GLX. 

The cooling fan comes on every time i remove the key. The engine doesn't have to have been running first. I simply turn the ignition on without starting the engine (even after being idle all night), when I turn it off everything is fine but when I remove the key the fan kicks in a couple of seconds later and stays on longer than i ever saw a fan stay on before. 

Anyone got any idea what the problem might be? 

any help greatly appreciated.

14 minutes ago, halpo said:

fan kicks in a couple of seconds later and stays on longer than i ever saw a fan stay on before. 

 

Whilst you are waiting on a reply, how long does it stay on for? Have you tried timing it? I would suggest a min or so is ok but if its staying on for say, ten mins or even longer, there is definitely an issue.

Sorry I had to quote an obvious post but for some reason, I could not just post the normal way!

 

Oh, I saw threads regarding Octy's doing this and some mention the DPF... Is your car equipped with one?

Edited 22 July, 20205 yr by mrgf

25 minutes ago, mrgf said:

Whilst you are waiting on a reply, how long does it stay on for? Have you tried timing it? I would suggest a min or so is ok but if its staying on for say, ten mins or even longer, there is definitely an issue.

Sorry I had to quote an obvious post but for some reason, I could not just post the normal way!

 

Oh, I saw threads regarding Octy's doing this and some mention the DPF... Is your car equipped with one?

Just timed it there now and its staying on for 10 minutes and 16 seconds. thats after simply turning on the ignition without starting the car then removing the key.

 

14 minutes ago, halpo said:

fan kicks in a couple of seconds later and stays on longer than i ever saw a fan stay on before. 

 

Whilst you are waiting on a reply, how long does it stay on for? Have you tried timing it? I would suggest a min or so is ok but if its staying on for say, ten mins or even longer, there is definitely an issue.

Sorry I had to quote an obvious post but for some reason, I could not just post the normal way!

 

Edit... I just read a post concerning car inIreland, some years ago. The owner was searching for clues to a running fan, which over the long and short of it, turned out to be his ECU. He cleaned it up, using WD40, refitted it and never had the problem again. This was after fitting repellent fans and doing many other things such as fixing some wiring he thought responsible. Five years later, someone asked him how he dismantled the ecu but he could not remember. That said, he posted no more about HIS situation... I believe his car was an 04, he also mentioned the car having an 05 ECU so it may already have been replaced, previously.

 

Having had a similar issue with my wipers, the module being cleaned up and protected/refitted with no reoccurrence, I could well see his issue being resolved! Just a thought.

1 minute ago, halpo said:

Just timed it there now and its staying on for 10 minutes and 16 seconds. thats after simply turning on the ignition without starting the car then removing the key.

 

That does sound a little long... You didn't mention a DPF, though. If they are interrupted mid-cycle, they can stay on too long.

i think it has a DPF alright.

thanks