Help! electric fan (again!)

minis84 · Post by **minis84** » Mon Jun 13, 2005 9:04 am

Hey

I got my GT about 3 weeks ago, and found that the electric fan wasn't cutting in when it was supposed to. After testing the fan, I replaced the switch, and it all worked fine.

Sitting in traffic this morning on the way to work, the temperature rose past its normal point before the fan cuts in. I whacked the heater on full, and opened all the windows, seemed to do the trick, bringing it back down to about 75deg.

Got to work a few minutes early, so i let it idle to see if the fan came on. It got up to 110deg, and the fan hadn't cut in. I'm going out to test the fan on my lunch break, but can anyone think of anything else it could be?

I doubt its the switch, as its only 2 weeks old, and a genuine VAG part!

Cheers in advance

Tom

ste mk1lx · Post by **ste mk1lx** » Mon Jun 13, 2005 11:36 am

an air lock in the system perhaps?

minis84 · Post by **minis84** » Mon Jun 13, 2005 12:00 pm

but surely the fan would just come on more frequently if there was an airlock? Or do you mean there's an airlock that is causing there to not be coolant around the switch, therefore not activating it when it needs to be?

Tom

amstrange1 · Post by **amstrange1** » Mon Jun 13, 2005 1:06 pm

minis84 wrote:Or do you mean there's an airlock that is causing there to not be coolant around the switch, therefore not activating it when it needs to be?

I've had exactly that happen before.

minis84 · Post by **minis84** » Mon Jun 13, 2005 1:30 pm

so to cure it you?.....

- take the rad cap off and give it a bit of a rev when warm?

- take the top hose off the rad, run the car and flush the system out?

or are there other methods?

by the way, what coolant can you run in a VW? I've heard something about G11? or is it B11?

Cheers

Tom

hardhitter · Post by **hardhitter** » Mon Jun 13, 2005 4:28 pm

Theres a bleed screw for the heater, under the scuttle tray. The coolant used to be G11, but is now replaced by G12+

minis84 · Post by **minis84** » Mon Jun 13, 2005 8:54 pm

well, i went out on my lunch break, and tested the fine - all worked fine. I sprayed the connector plug with GT85, and also the switch, and it came on exactly when it was supposed to - about 102deg.

Don't quite know why it didn't work this morning, but i'll be keeping my eye on it!!

Thanks for the advice, i'll bear in mind the airlock in the cooling system as a possibility, and I'll have search for the heater bleed valve tomorrow.

As regards the G11/G12 - where do I get this stuff from?

Thanks!!

Tom

amstrange1 · Post by **amstrange1** » Tue Jun 14, 2005 11:10 am

The coolant is available from VAG, or slightly cheaper at GSF.