RE: Cooling fan problems (again)

[Tim Ebling <tim@surrealsoft.com>]

>
>> Over the last week my car has overheated 3 times, and every time I
>> checked the fan and it's not running.  I'm going to clean the contacts
>> to the thermoswitch this weekend but I'm wondering if there are other
>> possible culprits.  If my thermostat was failing would it also cause
>> the fan not to come on?
>
>      Thermostat and Thermoswitch dont have anything in common, so if one
>doesnt work, it shouldnt affect the workings of the other.  The only
>things that would cause your fan not to come are:
>
>	1)  Your thermoswitch is bad, meaning that at higher temperatures
>	    it doesnt switch on like it should.  Easy way to test is while
>	    you have the unit in the radiator and the wires hooked up, put
>	    a screwdriver between the terminals, this should short the 
>	    connectoin and cause the fan to come on.  If this doesnt work
> 	    then the wire from the fuse box to the switch has no power, 
>	    meaning a busted wire or the wire to the fan is busted.  If
> 	    the fan turns on, then you have a bad thermoswitch.  Use a
>	    voltmeter to check for power and make sure you have a good
>	    ground connection.  
>
>	2)  The contacts could be bad on either the thermoswitch or the
>	    fan.  Clean em up and that should determine that.
>
>      I would guess #1 is more than likely the culprit.  Good luck....
>Oh, your fuse box could have something wrong with it but lets not hope
>thats it.  Let me know how it goes.
>
> Andre'

Thanks for the tip, Andre.  I should have mentioned that I've already
tried
#1, and my fan works perfectly when jumpered and also when the A/C is
on.  So I'm using the "turn on the A/C so the car doesn't overheat"
trick to
avoid serious trouble.  And my thermoswitch is brand new from the VW
dealer.

Tim

>
>
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