just fitted a dimming pull cord lightswitch in the bathroom but after much head scratching as to why the fan wouldn't switch off after X minutes I found the switch leaks, 24v to be precise, and it doesn't despite. the LV lights don't work with that voltage but it's enough to keep the fan running as it's the switched live.
anyone know a solution or supplier of a switch that doesn't leak ?
thanks
This one from TLC specifically states it is OK for use with bathroom fans...
What sort of transformer for the LV lights? Electronic or normal? If electronic, changing to a wound one one should do it (but make sure it's suitable). Or add a relay. The fan voltage sensor must have a high input impedance so is sensing at near zero current.
transformers are electronic, but the fan isn't on a transformer, it's 240v the switch isn't suitable for wound transformers just bought a replacement from TLC, as suggested by Sparks, but it's the exact same switch just in a different box
back to the drawing board...
The problem isn't with the fan as such but the high input impedance of the electronic transformer. A wound transformer would shunt the leakage from the dimmer to neutral. A suitable resistor across the electronic transformer input might well do the same thing.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required