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Old 07-07-2010, 05:46 PM   #1
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12v bathroom fan

Hi I have a problem my 12v vent fan blows the fuse when turned on tryed another motor still does it any ideas?

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Old 07-08-2010, 11:24 AM   #2
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Is the off-on switch remote or is it on the motor? The short might be in the switch itself.


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Old 07-08-2010, 07:20 PM   #3
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its remote but i think i got it motor is drawing 21 amps to much for circut ill try to bypass switch
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Old 07-08-2010, 09:10 PM   #4
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Hi C_Fink

Since you seemed to be able to measure amps to get 21.... way too much for the normal bath fan of any kind I have ever seen... it sounds like you have a short somewhere in the wiring to draw that much current. The mini wires on the fan normally are not that big even...

And since you tried a 2nd motor

Unhook the motor leads and with the power off, start using an ohm meter to check for continuity to DC ground from the hot side. If you have continuity to ground on the hot wire when you flip the wall switch on, well start back tracking from there to find the short.

Good luck and hope this helps

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Old 07-09-2010, 04:31 PM   #5
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Thanks for the help guys its really been very helpfull
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