[DeTomaso] Radiator Fans Running Constantly

[Thomas Tornblom]

If the switches are the same Otter switches that were in my GT5, with 
three small nuts holding them to the radiator, they may be full of water.

I opened mine up, and they were full of water, and with some TLC I got 
them sort of working, but I replaced them with modern threaded switches.

I'm now controlling the fan from the EFI instead, so no switches at all 
in the radiator.

Perhaps the shop leak tested the radiator with air pressure in a water 
tank, with the switches in place?

Thomas

Mike Reilly skrev 2014-04-14 21:52:
>     All, thanks for all the great trouble shooting tips.  I deduced that
>     both my thermo switches are bad.   Summary:
>     - when the two wires (brown and black) are connected to the thermo
>     switch the fans run constantly
>     - when the two wires are switched on the thermo sensor the fans still
>     run constantly
>     - when I connect the thermo leads to each other the relays work
>     - connecting a connectivity meter to the blades of the thermo switches
>     shows that they are in the closed position and allowing current flow,
>     thus the fans always run
>
>     My new rebuilt radiator is working great but I am surprised that both
>     thermo switches are bad given that they both worked fine before the
>     radiator was re-cored.  I guess something happened to them during
>     boiling out and welding of the new radiator components if the shop had
>     the sensors mounted while doing the work.  I'll be looking to order
>     some new ones or go with the slick fan control kit from Pantera
>     Electronics.   Thanks again!  Mike
>
>
> !DSPAM:534c3c9a224151562831224!
>
>
>
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-- 
Real life:   Thomas Törnblom             Email:    thomas at hax.se
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