Help wiring

Why is neutral going to your light switch? If your light switch and the other switch are closed, you'll have a dead short.

What I have done is taken the 3 core + earth which was already installed by previous owners, one red always live and the yellow only live when the light is switched on.

I have read the diagram as L=live N=neutral T switched live, and wired from my original cable on that basis.

You've labelled the diagram wrongly. The circled cross is the light not the light switch. Hence Andy's disingenuous query.

Is the X within a circle, next to your blue 'Light switch' text, really a switch, or actually the light bulb itself. If the former, then what AB says is right. Have you blown a fuse somewhere which is why the fan won't work? Does the light still work? Is there a fuse within the fan/timer humidity unit that's blown?

If the light is switched on, the fan should get live on both lives whether you wired them wrong or not. Hence the fan should operate when the light is on. If you got the lives the wrong way round to the fan, then it won't run on for 5 minutes after the light is switched off. I'm assuming you got the neutral right.

The phrase "light switch" should be next to the switch, not the bulb symbol.

It's not... The diagram looks OK to me.

Ha - I did not even read the words - just read the symbols. I see the confusion now...

To answer previous posts: Nothing is tripping at the mains. Yes the circle with cross will be the bulb (my mistake) The blue wire has been located where terminals are marked N. When I check the live and the switched the the switched is a lesser brightness (using a mains tester)

If the light is turned on, the switched live should be the same brightness. If it's dimmer, perhaps a loose connection?

If the light is turned off, there should be no signal on the tester.

Some testers require you to place your finger on a metal plate on the side to get a good reading.

That's normally only for impedance testing.

I will leave for now and do some checking tomorrow when I get a multi meter, Now too dark to work with mains off.

No it isn't. It's to act as the other end of the capacitance to measure a live voltage. The power to light the neon has to go somewhere, and that's into you.

Impedance testing requires a separate crocodile clip on a short lead.

It's a humidistat fan, so may only work when the air is humid. Check for jumpers/adjustment inside the fan. Make sure permanent live and switched live are in the correct terminals.

I will check the wiring again tomorrow but I triple checked at the time as elec scares the Sh.. out of me. the fan should come on I believe regardless of humidity. I did adjust the `timers` for the fan made no difference.

Have you fitted the cover to the fan - I recently got 'caught out' as there was a very small magnet on the cover that operated a reed inside. I had looked for a switch operated by the cover (Airflow Loovent) and not having found one assumed that I had a defective fan, tried it on the bench, fully assembled, and it worked, installed with cover off it didn't! Cover in place everything OK.

Peter

I havent tried with cover on but there is no magnet or micro switch on it. I did look for that earlier. I was wondering if the live and switched live should be reversed?

It would still run! bIt just would not be a timed fan.

Does the light work?