I have a Nutone Range Vent Hood above my stove. Not sure on model
number or anything but is the basic type, light and 2 speed fan which
circulates back into room.
My problem is when I ran the fan on low speed only and shut off it
trips a GFI outlet next to the stove almost every time.
There is not much else on the circuit, most outlets are unused at this
point, except for 2 clocks and a radio. I tried replacing the rocker
fan switch but it still continues with the same thing. Could the
outlet be bad or is there something else to look for? Thanks for your
help on this.
This is a common problem with some GFCI recepts. The fan motor
inductance creates a hefty voltage spike when the switch is opened
and that can trigger the GFI circuitry.
It may be easier to replace the recept with another brand,
but you can play around with small value capacitors across the motor
to dampen the inductive spike.
The fan shouldn't be on the outlet circuit to begin with, and has no need to
be GFCI protected, so pull out the GFCI outlet, remove the "load" wires
going to the fan, splice them to the "line" wires, with a pigtail feeding
the line side only of the GFCI
While eliminating the GFI protection from the hood fan will stop the
nuisance tripping, it may open up the possibility of shock or electrocution
in this instance. The GFI could be tripping because there is a genuine
current leak. By not correcting the problem and eliminating the GFI
protection a person could possibly get a shock from touching the hood fan
and the stove at the same time.
I suggest changing the GFI receptacle first to see if the problem goes away.
If not then you need to fix or replace the hood fan.
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