Thread: electric fans on my radiator.- do they need to be thermostaticly controled??

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Originally Posted by Beerstudd

I used the Painless kit to do mine. Comes with the thermostat for the motor, relay, wiring and fuse or breaker. Kit was about $65 for all of it and made it really simple. You can add a switch to it if you want also.

I too am running the Painless kit - but what I wanted to add is that they do have several temp senders from 165 to 210. There are also several others that have an adjustable rheostat that also works well, but have a long Bourdon tube that has to be contended with. Regardless of whatever way you go, you should still have a relay to kick it on as a fan draws a lot of start up current and can cause damage to other components.

My fan operates off a relay controlled by a 180 Deg. temperature switch. I also installed a toggle switch that will bypass the temperature switch in case of a temperature switch failure.

1 speed fans?