Tempreture switch
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Joined: Mar 2007
Posts: 63
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From: California
Tempreture switch
Got a stroked 350 that has auxillary fans. The question is why do i keep blowing out the temp switch that turns on my fans? All it is supposed to do is get to 185 degrees and form a gruond that turns on my fans. It seems that after a month of use it blows out. I know this because once i take the connector off and ground it too the frame it works.
Melting Slicks
Joined: Oct 2006
Posts: 2,417
Likes: 336
From: Texas
is the switch acutally grounding the fan motors themselves?, the switch needs to just ground the coil of a relay , and the relay provides a path to ground for the motors.or supplies +12v to the motors. aftermarket switch wasnt designed to carry the load of the fans.
http://forums.corvetteforum.com/c3-t...spal-fans.html
http://forums.corvetteforum.com/c3-t...spal-fans.html
Last edited by speedreed8; Dec 19, 2010 at 10:10 AM.
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Joined: Mar 2007
Posts: 63
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From: California
Correct it does have a relay and is set up properly.
When the temp switch in the manifold heats up to 185, it forms a ground and through the relay operates the fans. But for some reason i keep burning out the temp switch
Speedreed8 .....i looked at durango boys thread, my fans are hooked up right, but i am operating two fans off of one relay using a 30 amp should i use ahigher amp relay
When the temp switch in the manifold heats up to 185, it forms a ground and through the relay operates the fans. But for some reason i keep burning out the temp switch
Speedreed8 .....i looked at durango boys thread, my fans are hooked up right, but i am operating two fans off of one relay using a 30 amp should i use ahigher amp relay
Last edited by BERIN; Dec 20, 2010 at 01:42 AM.
Burning Brakes
Joined: Feb 2004
Posts: 924
Likes: 2
From: Kearneysville West Virginia
Correct it does have a relay and is set up properly.
When the temp switch in the manifold heats up to 185, it forms a ground and through the relay operates the fans. But for some reason i keep burning out the temp switch
Speedreed8 .....i looked at durango boys thread, my fans are hooked up right, but i am operating two fans off of one relay using a 30 amp should i use ahigher amp relay
When the temp switch in the manifold heats up to 185, it forms a ground and through the relay operates the fans. But for some reason i keep burning out the temp switch
Speedreed8 .....i looked at durango boys thread, my fans are hooked up right, but i am operating two fans off of one relay using a 30 amp should i use ahigher amp relay
In addition, the relay coil will have an inductive kick when the temperature switch opens. If the relay coil current is high or marginal, the repeated inductive kick and arcing as a result, will burn the temperature switch contacts. If this is the case, a capacitor and/or a diode may be needed to supress the inductive kick. Or, just go with the tandem relay set up as mentioned above and it should be fine.
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Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Make sure to have a ground wire from the radiator to the frame or bumper bracket etc on the car. (not that it's causing your problem but....) it will stabilize the grounding circuit and give more consistant activation.