extractor fan replacement

[john cushnie]

I've replaced an inline extractor fan but the timer won't work I followed the old wiring which was

permanent live =brown
switched live =black
neutral = grey

on the new fan I've put the grey in N
and tried the black in LT and brown in L and swapped them round but can only get the fan to work when the light turns on.
any ideas?

 

[chivers67]

Have you adjusted the Timer at all? Might need a Tweak with a screwdriver?

 

[crystal ball]

Try swapping brown and black round

 

[john cushnie]

Have you adjusted the Timer at all? Might need a Tweak with a screwdriver?

Yeah I've tried that all the way round thanks

 

[john cushnie]

Try swapping brown and black round

I had them round the other way originally but it ran all the time, thanks

 

[DetlefSchmitz]

When you say it ran all the time - how long did you wait?

 

[EFLImpudence]

A. If you have them the wrong way round, it should work as you say - only when the light is on.

B. If you then swap them and it does the same, then the timer is faulty.

C. If it runs all the time - longer than the timer maximum - then the timer is faulty.


You seem to be saying that both B and C are the case; this is not possible.

 

[john cushnie]

I've come down now and cleared away, but when the black was in the L terminal it would only turn off with the isolation switch, I swapped the brown and black and it now turns off with the light switch but adjusting the timer wont increase the time so I'm beginning to think its faulty

 

[sparkwright]

What make is this?

I've recently had two identical in-line fans, and they would only work when the light was on, the timer function did not work.

I ended up buying a different make in the end, which worked fine, and proved the wiring was ok.