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Radiator Fan Won't Shut Off
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ddye
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PostPosted: Wed Jun 15, 2011 5:53 pm    Post subject: Radiator Fan Won't Shut Off Reply with quote

Oddness has occurred. Any ideas why the radiator fan won't turn off? I replaced the switch behind the headlight about 2 months ago and the temperature sensor that plugs into the radiator at the same time. It was working fine and then today when i started the van the fan came on....it was cold. Now every time I turn the key the fan comes on.

Curious
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danfromsyr
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PostPosted: Wed Jun 15, 2011 6:06 pm    Post subject: Reply with quote

is your AC left on?
this will happen if the switch is left bumped on on some years,.
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ddye
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PostPosted: Wed Jun 15, 2011 6:09 pm    Post subject: Reply with quote

danfromsyr wrote:
is your AC left on?
this will happen if the switch is left bumped on on some years,.


That was it. The wife drove yesterday and didn't get it all the way off.

Thanks!
Very Happy
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debbiej
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PostPosted: Wed Jun 15, 2011 10:12 pm    Post subject: Reply with quote

better than won't turn on
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vanagonjetta
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PostPosted: Thu Jun 16, 2011 7:41 am    Post subject: Reply with quote

debbiej wrote:
better than won't turn on


True, I felt so much better and so did my van when I replaced parts to get it working properly.
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Memphalia
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PostPosted: Fri Dec 30, 2011 12:59 pm    Post subject: Reply with quote

Ok so I was driving home today and the radiator fan kicked on high and ran on high the rest of the way home and when I turned off the ignition, the fan remained on. I checked the AC to make sure that it is off an it is. Any ideas?
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SCM
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PostPosted: Fri Dec 30, 2011 1:41 pm    Post subject: Reply with quote

Memphalia wrote:
Ok so I was driving home today and the radiator fan kicked on high and ran on high the rest of the way home and when I turned off the ignition, the fan remained on. I checked the AC to make sure that it is off an it is. Any ideas?


It's normal for them to stay on for a few minutes after turning off the vehicle when it's hot.
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Memphalia
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PostPosted: Fri Dec 30, 2011 2:42 pm    Post subject: Reply with quote

Yes, I am aware of this, but it will not shut off. I had to disconnect the battery to turn it off and 2 hours later when I reconnected the fan came back on. Possibly relay or fan switch? HELP
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crazyvwvanman
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PostPosted: Fri Dec 30, 2011 2:59 pm    Post subject: Reply with quote

Pull fuse #1, on left end of fuses. Does this stop the fan running?

What year?

Mark

Memphalia wrote:
Yes, I am aware of this, but it will not shut off. I had to disconnect the battery to turn it off and 2 hours later when I reconnected the fan came back on. Possibly relay or fan switch? HELP
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Memphalia
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PostPosted: Fri Dec 30, 2011 4:10 pm    Post subject: Reply with quote

Yep, pulled the fuse and still running. I also unplugged the radiator fan switch and still running.
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crazyvwvanman
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PostPosted: Fri Dec 30, 2011 4:51 pm    Post subject: Reply with quote

Ok, pull the relay from relay socket #5. Count from top left of main relay panel. That is the medium speed fan relay for the A/C. If that stops it, there is a problem in the back, in the A/C wiring or A/C relays back there.

If it doesn't stop it, could be the highest speed relay hidden up above the main relay panel, or it could be a weird wiring problem from the back A/C as a wire from the A/C connects to the control line for the high speed relay.

Mark


Memphalia wrote:
Yep, pulled the fuse and still running. I also unplugged the radiator fan switch and still running.
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Memphalia
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PostPosted: Fri Dec 30, 2011 8:26 pm    Post subject: Reply with quote

THere is no relay in the 5 spot, and i have been driving daily for 2 years like this (with everything working properly). The fan is stuck on high mode. How can I identify the highest speed relay hidden up above the main relay panel and test it? Where is it available for replacement? I ordered this

http://www.van-cafe.com/home/van/smartlist_1436/relay.html

Is this what should be in the 5 spot?

Oh, by the way it is an 89 Westy Full camper
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crazyvwvanman
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PostPosted: Fri Dec 30, 2011 9:34 pm    Post subject: Reply with quote

All 89 vans should have the relay in position 5 unless they are Syncros without A/C. That relay you linked to is not the right one for position 5, as far as I know.

In any case the missing position 5 relay isn't causing this problem. The high speed relay is up inside the dash area at the left end. It is hard to see without removing something. Look at Bentley page 87.5 and the drawing on the upper right shows the relay behind the left dash vent. That is the highest speed rad fan relay, 3rd stage.

(on left of same page shows relay panel with arrow to position 5 for 2nd speed fan relay)


I can't find the right relays on VanCafe site so here is another source.

This is the highest speed 3rd stage fan relay-
http://www.autohausaz.com/search/product.aspx?sid=...an%20Relay


This one will work in a pinch for 3rd stage-
http://www.autohausaz.com/search/[email protected]


This (upper) one is what I would expect in position 5-
http://www.autohausaz.com/search/product.aspx?sid=t0h4evvhuh0ojx45zqn0e345&partnumber=141951253B


It sounds like your 3rd stage fan relay stuck in the on position. If so, I wonder why it was coming on at all this time of year, unless the low speed isn't working and that is a common failure that should be checked after you get past this constant fan problem.

Mark


Memphalia wrote:
THere is no relay in the 5 spot, and i have been driving daily for 2 years like this (with everything working properly). The fan is stuck on high mode. How can I identify the highest speed relay hidden up above the main relay panel and test it? Where is it available for replacement? I ordered this

http://www.van-cafe.com/home/van/smartlist_1436/relay.html

Is this what should be in the 5 spot?

Oh, by the way it is an 89 Westy Full camper
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Memphalia
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PostPosted: Fri Dec 30, 2011 10:35 pm    Post subject: Reply with quote

Thank you sir, I have ordered and will try!
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koolmoe
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PostPosted: Mon May 05, 2014 12:35 pm    Post subject: Reply with quote

Just FYI and a bump. My fan had been running as soon as I started the Bus for about a week and kept meaning to search here to figure out why...and did today, and first result was this thread...and went out and checked and indeed the AC knob was half-way 'on'...
(which is odd cause my AC hasn't been charged in years and I never use it - probably one of the kids messing around)...

So thanks for the thread and replies. Turning off knob stopped the fan startup. Phew! Love the easy fixes, so rarely the result on this old gal...
KM
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danfromsyr
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PostPosted: Mon May 05, 2014 12:45 pm    Post subject: Reply with quote

WOW, blast from the past.

and to note that this can be a benefit as well.
those whose AC works this way can turn the Rad fan ON to help after a long hard or hot hill/mtn/traffic
just make sure you turn it back OFF once things are evened out.
*note I've heard at least 1 story of a burned out rad fan or AC clutch from prolonged power demand. food for thought.
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Pastelweis
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PostPosted: Sun Sep 25, 2016 5:47 am    Post subject: Re: Radiator Fan Won't Shut Off Reply with quote

@memphalia I have the exact same problem, did you find a solve in the end?
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