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Discussion Starter #1
Hello!

I have a combined heater/vent/lamp in my bathroom that recently stopped working altogether. None of the functions are working and it did not seem to be operating abnormally before failing. There are no tripped breakers in any of the panels. I cannot say for sure though which breaker controls this because the breakers are unfortunately poorly labeled at best, and one labeled "toilet fan, master bath" (pen on blue masking tape) is a 125A breaker.

It is controlled by a three-rocker switch. I am not getting any power by measuring from the single conductor on the left side of the switch to the ground on the back of the switch. Is this a correct measurement? Should I be getting power here if the wiring is intact and all the breakers are on, even if the device isn't functioning? What next steps can I take in diagnosing this?

Thanks for any help!


 

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Assuming the wiring and breakers are intact, you should be measuring 120v between hot and ground even if the fan is not functioning. Is this the only thing in the house that's not working? Check nearby receptacles to make sure you have power there.

Edit: just to be clear, this is a single unit with 3 functions? each function on it's own rocker switch?
 

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Could there be a GFI, ground fault outlet in line (on same run from breaker box) with your switch? If so, it may have tripped, doing its job. Reset it and your switch will get power again.
 

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Could there be a GFI, ground fault outlet in line (on same run from breaker box) with your switch? If so, it may have tripped, doing its job. Reset it and your switch will get power again.
This is a good suggestion. If it is the cause it 'should' be tied to the GFI receptacle in that same bathroom.
 

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Discussion Starter #5
Thank you for the replies. Yes this is a single unit with 3 functions (heat, vent, lamp). Each rocker switch controls a function and none of the functions are working.

Everything else in the bathroom, and in the house for that matter, is working, and there are no tripped GFCIs. Great suggestion by the way!
 

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Your pic2 with 3 screws represent the 3 devices and wires look ok.
Your pic1 shows the single hot feed (1 screw) and looks ok. If, however, inside box, that hot feed was pigtailed and hot wire with joined connections under a twist on electrical cap is loose, no power to switch. Check and tighten?

Lastly, actual all-in-one fixture in ceiling may have its own breaker and reset switch. If it was overloaded, it may have blown. Switch would be somewhat user friendly/accessible by probably removing light dome and looking with a flashlight.
 
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