[alfa] Fan switch issue

[George Graves <gmgraves@xxxxxxxxxxx>]

Here's a strange one. On my GTV-6 even with a new thermal fan switch 
installed, the fan cycles on-and-off so quickly that the engine runs 
very hot. With the thermal switch bypassed by a jumper, so that the fan 
runs all the time, the engine remains cool. There is nothing in the 
circuit but the fan relay and the switch, but the relay is in use 
whether the thermal switch is in the circuit or a jumper is in it's 
place. Why would the thermal switch make the fan cycle on and off (it 
only stays on for about 10 seconds before it cuts off, then it starts 
up again as soon as the blades stop turning and runs for another 10 
seconds) even when the temperature gauge on the dashboard says that the 
engine is so warm, the fan should be running constantly? BTW, the 
radiator and water pump are both new as of a little over 5000 miles 
ago, the cooling system's been bled, two thermal switches have done 
exactly the same thing, and the problem started out of the blue after I 
had the engine cleaned a little over a week ago.  I've got to say, I'm 
puzzled with this one. Any suggestions will be greatly appreciated.


George Graves
'86 GTV-6 3.0 'S'
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