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Model specific boards => Golf mk4 => Topic started by: barrym381 on 06 September 2014, 21:08

Title: mk4 1.8t coolant fans not working
Post by: barrym381 on 06 September 2014, 21:08
mk4 1.8t coolant fans not working tried fuses new sensors even swapped fans over from my other 1.8t that i know work an they still did nothing  :headbang: they work if i bridge the switch at lower rad
Title: Re: mk4 1.8t coolant fans not working
Post by: sharki786 on 06 September 2014, 21:40
Have you checked the fuse on the fan control mod? If they fine then check the temp sensor or vag com it.
Title: Re: mk4 1.8t coolant fans not working
Post by: barrym381 on 06 September 2014, 21:59
Have you checked the fuse on the fan control mod? If they fine then check the temp sensor or vag com it.
tried both fuses on top of the battery  :sad: still nothing
Title: Re: mk4 1.8t coolant fans not working
Post by: sharki786 on 06 September 2014, 22:21
Check on vagcom
Title: Re: mk4 1.8t coolant fans not working
Post by: sharki786 on 06 September 2014, 22:22
Could it not be the temp sensor?
Title: Re: mk4 1.8t coolant fans not working
Post by: barrym381 on 06 September 2014, 22:23
Could it not be the temp sensor?
new 1 fitted  :wink:
Title: Re: mk4 1.8t coolant fans not working
Post by: sharki786 on 06 September 2014, 22:30
Genuine? Could be a faulty new1?
Title: Re: mk4 1.8t coolant fans not working
Post by: barrym381 on 07 September 2014, 10:01
Genuine? Could be a faulty new1?
yes a genuine 1 was used  :smiley:
Title: Re: mk4 1.8t coolant fans not working
Post by: Dalo Harkin on 12 September 2014, 13:20
do you drive like a girl  :tongue: :grin:
Title: Re: mk4 1.8t coolant fans not working
Post by: james2 on 12 September 2014, 14:17
Have you changed the thermostat.
Title: Re: mk4 1.8t coolant fans not working
Post by: Bellend on 12 September 2014, 17:34
There is a fan control module under the battery tray.

This is probably your issue. You need to find one that matches part numbers as the pins are different on different models. I'm just about to break up a 2001 1.8T with manual air con.
Title: Re: mk4 1.8t coolant fans not working
Post by: barrym381 on 13 September 2014, 15:29
do you drive like a girl  :tongue: :grin:
yes a german 1  :wink:

Have you changed the thermostat.
yes new genuine 1 fitted  :smiley:


There is a fan control module under the battery tray.

This is probably your issue. You need to find one that matches part numbers as the pins are different on different models. I'm just about to break up a 2001 1.8T with manual air con.
tried this with swapping the part from my other 1.8t still no luck  :smiley:
Title: Re: mk4 1.8t coolant fans not working
Post by: Bellend on 13 September 2014, 20:22
That's incredibly odd. Have you checked power and earth at each stage?
Title: Re: mk4 1.8t coolant fans not working
Post by: barrym381 on 13 September 2014, 20:40
That's incredibly odd. Have you checked power and earth at each stage?
tried this too  :smiley:
Title: Re: mk4 1.8t coolant fans not working
Post by: Bellend on 13 September 2014, 20:46
That's incredibly odd. Have you checked power and earth at each stage?
tried this too  :smiley:

At which stage is the power not getting through?

Bridge temp switch and then check there has got to be a break in the circuit somewhere.