Associate
Afternoon all.
I have been up in my loft over the last few days dealing with the ducting in my extractor fan after discovering a small swimming pool developing up there. After much faffing with rigid ducting and insulation I hope I have sorted it out.
Anyway whilst I was up there I thought I'd have a look at how the extractor fan was wired up. The fan has a timer function so it should keep running for a while after the switch is turned off but this has never worked. I understand these are usually designed to be connected to the lights but I specifically asked them not to do this when they wired it up as there is nothing worse than getting up for a pee in the middle of the night and having to listen to the fan for 10 minutes afterwards! So the fan has its own switch next to the switch for the lights. However when you turn this switch off, the fan goes off immediately without the overrun. See below wiring:
Fan (can't see in the photo but terminals are marked as L / N / SL as you look at it)
Isolator
Switch (the fan switch is on the left when the faceplate is screwed into the wall and you are looking at the front of it, lights on the right)
The fact this didn't work properly never initially bothered me but given the issues I've been having with condensation recently ideally I'd like to have the timer working (without connecting it into the lights so I an still use the lights without running the fan) so that it clears the ducting a bit better and hopefully reduces any condensation forming. I doubt I will be doing this myself and will get the electrician to have a look at it next time I am having work done however I am curious to understand how its been wired up and why it doesn't work as it should. Presumably it is missing a permanent live? But why? There is a black wire you can see in the photo of the wiring on the fan itself which is not connected to anything. I thought this might be a live so I tried connecting it up but nothing happened. That's probably about the limits of daft messing around with things I don't really understand that I will be doing but I am still curious to have a bit of a better understanding as to what is going on here.
I have been up in my loft over the last few days dealing with the ducting in my extractor fan after discovering a small swimming pool developing up there. After much faffing with rigid ducting and insulation I hope I have sorted it out.
Anyway whilst I was up there I thought I'd have a look at how the extractor fan was wired up. The fan has a timer function so it should keep running for a while after the switch is turned off but this has never worked. I understand these are usually designed to be connected to the lights but I specifically asked them not to do this when they wired it up as there is nothing worse than getting up for a pee in the middle of the night and having to listen to the fan for 10 minutes afterwards! So the fan has its own switch next to the switch for the lights. However when you turn this switch off, the fan goes off immediately without the overrun. See below wiring:
Fan (can't see in the photo but terminals are marked as L / N / SL as you look at it)
Isolator
Switch (the fan switch is on the left when the faceplate is screwed into the wall and you are looking at the front of it, lights on the right)
The fact this didn't work properly never initially bothered me but given the issues I've been having with condensation recently ideally I'd like to have the timer working (without connecting it into the lights so I an still use the lights without running the fan) so that it clears the ducting a bit better and hopefully reduces any condensation forming. I doubt I will be doing this myself and will get the electrician to have a look at it next time I am having work done however I am curious to understand how its been wired up and why it doesn't work as it should. Presumably it is missing a permanent live? But why? There is a black wire you can see in the photo of the wiring on the fan itself which is not connected to anything. I thought this might be a live so I tried connecting it up but nothing happened. That's probably about the limits of daft messing around with things I don't really understand that I will be doing but I am still curious to have a bit of a better understanding as to what is going on here.