Extractor fan problem

Discussion in 'Electrics UK' started by tapir, 15 Mar 2012.

  1. tapir

    tapir

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    Hi all, first off, I'm not an electrician so may have missed the bleedin' obvious.

    Bathroom extractor fan powers on when lights turned on, stays on for a few minutes when lights turned off. Separate isolator switch outside of bathroom.

    The fan is a Manrose BG XF100LV
    this is powered by a remote Manrose transformer T12.

    Recently the fan stopped. it's been used a lot over its 6 year life, so assumed that it had had enough.

    Bought a replacement today, fitted as per instructions, but when lights turned on, the fan does not do anything (not even a faint buzzing). Checked the transformer, there's a red light that powers on when the light is switched on- that red light is still coming on and off when the light is powered on or off.

    I'm at a loss as to what the problem is - the only thing I've not been able to check is the cable between the transformer and the fan, which sits in a roof space (it's inaccessible)

    I've had the cover to the light switch off, couldn't see anything untoward, but then again, it might be something I just don't know what I am looking for.

    the only factor I can think of that may have caused this problem? the day I noticed the fan was dead was the same day one of our cats fell into the bath (with water in). I heard a commotion, ran to look to see the light pull swinging violently, and the cat looking sorry for himself. No idea if it's coincidence or unrelated

    Any suggestions that you can offer will be appreciated!

    Thanks all :)
     
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  3. wingcoax

    wingcoax

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    Get hold of a multimeter and check what (if any) voltage you have at the fan terminals, if ok check at switch. Silly question! you have got the same voltage fan? ;)
     
  4. Lectrician

    Lectrician

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    Just because the light on the transformer is coming on does not mean the output is working - measure the voltage output at the transformer or fan, usually 12vAC.
     
  5. DIYnot Local

    DIYnot Local

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