cooling fan coming on too soon

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vwgolf1.9tdi
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cooling fan coming on too soon

Post by vwgolf1.9tdi » Tue Jan 14, 2020 2:48 pm

Hi

I've got a 2008 vw golf 1.9 tdi bxe engine. When i start the car it starts fine and idles at the usual 800-900 rpm. After about 20 seconds the cooling fan starts and the revs increase. I have replaced the cooling temperature sensor but the fault remains. The car drives fine but will idle at about 1000-1100. intermittently the car will idle correctly but more than often during a journey it will idle high with the fan running. Any ideas what this could be without paying a fortune to get it diagnosed ?

Thanks
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someone-else
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cooling fan coming on too soon

Post by someone-else » Tue Jan 14, 2020 8:18 pm

How do you know its not working as it should?
Fret not, a forum is a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link to find out more.

Working on anything electrical? have you got a multi meter? why not? Would you hit a nail with a shoe?

If gloom had a voice, it would be me. :mrgreen:

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Bob225
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cooling fan coming on too soon

Post by Bob225 » Wed Jan 15, 2020 9:51 am

there are 2 temp sensors 1 for the ecu and the other is for the gauges iirc, I assume you have changed the temp sensor on the rad outlet on the engine (held by a big metal clip) Check the temp with a scan tool and see what it reads

Have you scanned the car for codes ? because it will usually store one
vwgolf1.9tdi
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cooling fan coming on too soon

Post by vwgolf1.9tdi » Wed Jan 15, 2020 2:08 pm

someone-else wrote:
Tue Jan 14, 2020 8:18 pm
How do you know its not working as it should?
The fan shouldnt come on until the engine reaches optimum temp or you use air con
vwgolf1.9tdi
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cooling fan coming on too soon

Post by vwgolf1.9tdi » Wed Jan 15, 2020 2:10 pm

Bob225 wrote:
Wed Jan 15, 2020 9:51 am
there are 2 temp sensors 1 for the ecu and the other is for the gauges iirc, I assume you have changed the temp sensor on the rad outlet on the engine (held by a big metal clip) Check the temp with a scan tool and see what it reads

Have you scanned the car for codes ? because it will usually store one
Hi
Ive replaced the temp sensor that goes in the side of the engine. ive only got an obd reader and that shows up nothing. Do you think it could be the other sensor on the rad outlet ?
Bob225
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cooling fan coming on too soon

Post by Bob225 » Thu Jan 16, 2020 11:57 am

TBH VW isn't my thing If it has a switch on the rad that's the one that controls the fan - edit. a quick look on ecp yes it does, £10-20 less discount (MID60 gives 35-40% discount)
vwgolf1.9tdi
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cooling fan coming on too soon

Post by vwgolf1.9tdi » Fri Jan 17, 2020 11:09 am

Bob225 wrote:
Thu Jan 16, 2020 11:57 am
TBH VW isn't my thing If it has a switch on the rad that's the one that controls the fan - edit. a quick look on ecp yes it does, £10-20 less discount (MID60 gives 35-40% discount)


Thanks for that ill get one of them. do you happen to have a link or a part number so i can get one. ebay is a mine field when it comes to car parts.
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cooling fan coming on too soon

Post by Bob225 » Fri Jan 17, 2020 2:14 pm

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