Help wiring bathroom extractor fan

[BFC]

Hi, first post so be gentle with me! I'm replacing an old extractor fan. The old fan had a timer built in, the new one doesn't (I just want it on when the light is on).

There are 3 wires to the current fan, Blue (neutral presumably), Red (Live presumably), Yellow (Switched live presumably) and an earth wire that goes nowhere.

The new fan only has locations for 2 wires, Live and Neutral.

Question is, which wire(s) should go to the Live point on the fan? The Yellow (switched live), the Red (Live) or both? Assuming I only need to use one of the current live or switched live wires, what do I do with the 'spare' one?

Hope this makes sense! Thanks.

 

[baz1968]

The switch wire and neutral is all that is needed, and the permanent live should be disconnected at the other end of the cable or put in a connector block, but i'm a bit concerned that your guessing what is permanent live and what is switched live.... to know for sure you should use a multimeter

 

[BFC]

Thanks, I thought that was probably the solution, will double check which wire is which before doing anything, said presumably because from previous experience it's the most likely combination. Cheers.

 

[baz1968]

Different sparks use different combinations as both Red and Yellow are old phase colours

 

[333rocky333]

50/50 chance
Fan will run constant OR fan will switch ok,
If wrong just swap.
Remember to ISOLATE

 

[BFC]

Just checked, no power to either the permanent or switched live! Great, never simple is it! Now got to find out why. Thanks for your help.

 

[ban-all-sheds]

On the basis that the old fan worked, 'cos you knew it had a timer, I'm tempted to ask what you've done that could have removed the supply...

 

[BFC]

Old fan hasn't worked since I moved here. I only know it had a timer because I took the cover off and there's a bit to adjust the timing. May even be that the old fan works, I'll never know until I can find out why there's no power.

 

[Taylortwocities]

There might be a fan isolator somewhere.....

 

[333rocky333]

..

 

[BFC]

Any suggestions where a 'fan isolator' is likely to be?

 

[333rocky333]

might be an FCU
can you follow the wire from the fan.
could be above the door outside the room or even in the loft , there seemed to have been a weird thing once with bathrooms , where people were finding them in very strange places ,I found one under the floorboards.

 

[Taylortwocities]

You found a BATHROOM under the FLOORBOARDS???

 

[BFC]

Can't see where the cable goes, it's in a downstairs toilet, only place it could be is in the ceiling, I'm buggered if I'm having the carpet and floorboards up upstairs to check , it'll have to stay not working!

 

[333rocky333]

it may be on the side of a socket nearby
there was a recent post where the bloke was advised also to look in a strange place,think it was a regular that said it though