Vehicle & Technical > Discovery

now this is a wierd problem. Must be a 1st?

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muddyjames:
I had the heater ongoing into work today as it was a tad chilly. I had it on blower 4 but that keeps on over heating so no3 on full heat is the best compramise.

I had it on 3 and turned engine off, took key out of ignition and the blowers were still working  :shock:

I turned it down to 2 and they turned off.Wierd I thought.

Came home and had blowers on 3 again to see if it did it again. and they did. Key in my paw and fan still on. turned fan onto 2 and still working, onto 1 AND still going.  :roll:

If I try and turn the fan up the scale it stops dead and on 0 it stops too.

My thinking was if the key is in my paw there would be no power to the fans, only the interior light and alarm. Is there some major leccy wiring going mad and about to short out and set disco on fire :( or is there a perfectly good reason for this like the heater matrix needs to cool down?

Any help needed please.

Steven:
No help from me, but our heater was on full (hot) today in the disco and just turned off on its own :?

muddyjames:
does yours come back on after a few seconds after it has cooled down a bit? mine does.

lrmike:
The blower switch is the culprit for the fan cutting off when on HI.  The contacts get hot, the fan stops, contacts cool down, it comes back, etc. etc.

As for the original problem from muddyjames...

What do you mean by overheating?  If you have the cuts off on HI speed deal, put  a switch in first and see if all the mystery goes away (it sounds like you may from the last reply).  If not, perhaps a relay?

muddyjames:
Not 100% sure what you mean in your post?

The contacts getting warm is why the fan cuts out then but why does my fan stay on even when the key is in my hand and not in the ignition? When I turn the fan down it turns off. If I turn the fan speed up it doesnt come back on.

Are the contacts melting and keeping it on? I cant see it would be this as fan shouldnt work until ignition is on surely?

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