I broke another rocker switch last night for my fan. I'm using the light, two position (on/ off) switch. I've broke 3 of these now. I guess they're cheapo's from Advance Auto. I need to find a good, quality switch, that can handle the juice for an electric fan. The wires are on the back, and the switch is panel mount stlye, the wires go through a threaded male post, which you put a nut on from behind to tighten it. Any suggestions appreciated.
Thanks!
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MrWillys aka HRB
Member: Dipstick Street Rod Association
Paint don't make 'em any faster!

You runnin a relay on the switch? If not those switches are gonna break. Go get a plow light switch Its got 6 poles.Heck you should be able to break that one 6 times but keep using it LOL I have the ones that go into the rad at the petcock and turn the fan on all wired outside.Thye are only 20 bucks my cost and let you adj when the fan comes on (160-210 what ever you decide)
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Hot rod consultant for Kand K
engineer that dont drive the train
Driver of unpainted rods.

Ya gotta use a relay on your fans to keep a switch from frying. You can run more than one fan off a single relay if ya need to.

I have a question for you, Mike. If you place a temperature sensor in the petcock of the radiator, aren't you measuring cooled water rather than the hot water temperature? Do you compensate for this somehow. Just wondering how this gives you an accurate temperature reading as most sensors measure water temperature before it goes into the radiator.
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Lynn
'32 3W

I have a question for you, Mike (LostandFound). If you place a temperature sensor in the petcock of the radiator, aren't you measuring cooled water rather than the hot water temperature? Do you compensate for this somehow? Just wondering how this gives you an accurate temperature reading. Don't most sensors measure water temperature before it goes into the radiator.
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Lynn
'32 3W

Sorry about the double post--haven't had my coffee yet.
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Lynn
'32 3W

Lynn, Just a thought, in my opinion it doesn't make any difference where you place the sender for the thermostat as long as the fan thermostat is adjustable. I've placed sensors in both the top of the radiator ( in the fins ) and in the petcock at the bottom. I adjust mine to come on based on what the temp gauge says in the car. I generally set mine to come on at about 200deg. That way the fan only runs when you are at idle or going slow, when running at road speed your system should cool with out a fan. BTW I've learned that I am better off with a good puller ( 2,700 to 2,800 cfm with a shroud ) and no pusher. It's my belief that the pusher actually blocks air flow at road speed.
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Carl Larkins