Electrical interference/leakage

[James94]

Hi all,

I have had an electrician come and change how a bathroom online fan is controlled and when they had gone I noticed two of the four bathroom led lights are on constantly, very dim. If I turn them on and off and dimmer them they work fine but when off stay dim.

I'll give you a little background to what he's done. The fan was originally on a switch and he's changed how it works by installing a manrose 1361 remote bathroom fan humidity control with timer. He's also added a fan isolator in loft and he's connected it to the new fan which was in loft  manrose mf100t.

So,I've had him back and he thought her sorted it but same when they'd gone it was back the same two dim lights. He's now saying that it's because of the set up and the type of fan installed he's saying we need to buy a new fan that doesn't have an over run, is he correct?

Regards james

[Nickfromwales]

If they’re cheap leds then you may need a snubber (capacitor) across the feed to the lights. 
 

Do the leds only glow when the fan is running, and then go out when the overrun time has elapsed? 

 

Manrose is industry standard stuff btw, so it’s not like it’s made from Ali Express chinesium or worse. 

[James94]

Hi Nick,

there gu10 led bulbs from Screwfix, so not sure about cheapness.

he has mentioned about a capacitor but i don’t really understand it to much.

It’s only started since he’s fitted the humidity sensor, is this what’s causing it as fan is original?

 Im not sure what leds do when running as usually in shower when it comes on 😛 and light usually switched on. But when lights switched off the stay dim.

Is there any tests I can carry out to see what’s going on?

do I need to buy a new fan like electricians said as the one in is new, he says I need fan without overrun built in? Would this cure it?

Regards. James