Join Date: Feb 2000
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Re: electric fan - one more time
>>SPDT-single pole, double throw, center off is the type of switch that would
>>be the best. In one position you could use the thermostat, one position on
>>always, center power off.
Ditto to this. That's exactly what I've done; three-way rocker switch:
1 position - auto (thermostat operation)
2 position - perman. off
3 position - perman. on
Worked like a charm. As for the kick-in point: get a thermometer that goes up to at least 250F. Cool the engine a little bit so you can open the radiator cap. Now it's a good time to add some coolant :-) Start the engine and let it idle (you can turn on the heater fan or lights so it fast_idles). Put the thermometer inside the radiator neck. When the temperature reaches 200F, turn the adjusting screw on your thermo_switch so the fan goes on. Replace the radiator cap. Enjoy!!