Manrose bathroom extractor fan wiring help.

Lebung

Hi

I've had to replace my bathroom extractor fan. It was a Monrose quiet with timer.

The new one is another Manrose but without a timer.

However when I've wired it up it, it is on permanently, whereas the previous one only came on when the light was switched on.

The only difference in wiring it up is that the new fan is not earthed where as the old fan was.

What am I doing wrong please.

Belenus

I'm assuming this isn't a wind up for a newly registered member.

Step away from the fan and ask or get someone in who knows what they are doing.

Your timed fan needed two live wires. A switched live from the light switch and a permanent live, usually from a fan isolator switch.

 An untimed fan only needs one switched live, normally linked to the light switch.

You have probably wired the permanent live to the switched life terminal but you may also have wired a live wire to a neutral or earth connection. That could be very dangerous.

You, or preferably someone competent, need to disconnect the permanent live wire from the fan and connect the switched live in its place. You also need to safely terminate the now redundant permanent live wire.

I'm being deliberately harsh as you could electrocute yourself or someone else if you do not know what you are doing.

Why didn't you buy another timed fan? They cost very little more and the adjustable timed overrun is very useful.

Ectophile

If the old one had a timer, then it should have had 3 wires (in addition to the Earth): permanent live, switched live and neutral.

A fan without a timer should only need a live and neutral.  If the fan's running all the time, you've connected it to the permanent live, not the switched one.