Bathroom fan on a dimmer sith leds.

i=p/u · Mar 27, 2021

Fitted a fan for friend today and forgot it was off the lights, so now is on dimmer and seems to work fine. I see Amazon sell plug in dimmers for fans ..
thoughts men??

westward10 · Mar 27, 2021

No idea what you are getting at.

Dave OCD · Mar 27, 2021

He's saying the switched live to the fan will reduce in voltage as the lights are dimmed. But I wonder if that's just for the timer circuit and the permanent live runs the fan motor.

i=p/u · Mar 27, 2021

No timer on the fan, the switched live from lights is powering fan.

westward10 · Mar 27, 2021

What is it you are wanting to know.

DefyG · Mar 27, 2021

If the dimmer is slowing the fan then it may be totally ineffective as a fan (ie ltrs/min reduced) and you may as well not have one at all!

Dave OCD · Mar 27, 2021

I would have thought below a certain voltage the fan motor would just stall.

DJAndy · Mar 27, 2021

Depending in the make & model trigger voltages can be quite low. I've seen bad switches passing ~ 50v, as long as the perm live is normal the fan starts & runs happily.

i=p/u · Mar 27, 2021

Total load including fan is only 50w. What I'm asking westward, is can you see any likely problems coming from this bathroom fan with no timer on a dimmer switch?

I can move cable and maybe add in pull cord

Dave OCD · Mar 27, 2021

I think I'd put the fan on a separate pull switch, better for the motor and added convenience for the end user.

Dave OCD · Mar 27, 2021

DJAndy said:
Depending in the make & model trigger voltages can be quite low. I've seen bad switches passing ~ 50v, as long as the perm live is normal the fan starts & runs happily.

This isn't relevant as we're not talking about a timer fan in this instance.

i=p/u · Mar 27, 2021

Just throwing it out there, I knew had to change it.

i=p/u · Mar 27, 2021

Dave OCD said:
I would have thought below a certain voltage the fan motor would just stall.

Didn't seem to struggle, slow fast

DefyG · Mar 27, 2021

i=p/u said:
Didn't seem to struggle, slow fast

Did you test it with an anemometer, I'm sure you'll see the difference!

i=p/u · Mar 27, 2021

Defyg your off the rictor, the dimmer does control the fan, but isit a good idea or not. Il likely change it tomorrow if I have dp pullcord about me

DefyG · Mar 28, 2021

i=p/u said:
Defyg your off the rictor, the dimmer does control the fan

Im sure it does but any speed variation will after the extract rate which also isn't a good idea.

stevethesparks · Mar 28, 2021

i=p/u are you related to Buzz

i=p/u · Mar 28, 2021

Dont really care about extract rate, was just wondering would the motor burn out or would it not, wood the dimmer burn out would it not..

As said you can buy universal plug in fan controllers for fans with no settings, was thinking its simialar...