Boiled Ballz -- SOLVED

[indybobm]

Next time the engine is hot and the fan should be running, leave the fan wire on the Thermo Unit and ground the body of the Thermo Unit. If the fan turns, then you have bad continuity between the threads of the Thermo Unit and the radiator.

What would cause this, or better yet how would I solve it?  The OEM and likely original thermo unit is not triggering the fan, nor is the brand new one I just installed.  

Using a ground wire triggers the fan when grounded between the thermo unit and the radiator (as long as the thermo unit is plugged in) but it runs constantly that way.  

Thanks for your suggestions, BTW.

Did you use any type of thread sealant or teflon tape when installing the new Thermo Unit? You can remove the Thermo Unit and use a small brass brush to clean the threads in the radiator.

[Valkorado]

Next time the engine is hot and the fan should be running, leave the fan wire on the Thermo Unit and ground the body of the Thermo Unit. If the fan turns, then you have bad continuity between the threads of the Thermo Unit and the radiator.

What would cause this, or better yet how would I solve it?  The OEM and likely original thermo unit is not triggering the fan, nor is the brand new one I just installed.  

Using a ground wire triggers the fan when grounded between the thermo unit and the radiator (as long as the thermo unit is plugged in) but it runs constantly that way.  

Thanks for your suggestions, BTW.

Did you use any type of thread sealant or teflon tape when installing the new Thermo Unit? You can remove the Thermo Unit and use a small brass brush to clean the threads in the radiator.

Nope, no sealants used.  It's worth a try.  Thanks.

[indybobm]

Plus, the coolant has to be hot enough to activate the Thermo Switch. Around 212 degrees.

[Valkorado]

Well I feel like an idiot, but at least I'm a satisfied idiot.  Ground wire from the bottom of fan.  There is power line to the fan, and a separate ground wire that connects to the bottom of the fan.  212* and I'm in business.  With a new thermo switch and thermostat to boot!

Now on to splines...

Thanks, guys.

[indybobm]

Good to hear!

[Tfrank59]

Well I feel like an idiot, but at least I'm a satisfied idiot.  Ground wire from the bottom of fan.  There is power line to the fan, and a separate ground wire that connects to the bottom of the fan.  212* and I'm in business.  With a new thermo switch and thermostat to boot!

Now on to splines...

Thanks, guys.

That's pretty funny but it's how it is with electrical stuff.  I'm a zero or negative one when it comes to electrical so I know how you feel with the idiot thing.  . Great that you got it all fixed though