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Shower switch replacement

Discussion in 'DIY Disasters' started by DigbyTim, 30 Aug 2018.

  1. DigbyTim

    DigbyTim

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    My shower ceiling switch wouldnt turn off so I assumed it had burnt out. I replaced it, but after a couple of uses, the new switch got stuck on.
    Here's the odd thing. When I disconnect the new switch it works again. When I wire it back in, it gets stuck on.
    Does anyone have any ideas what is going on and how to fix it?
     
  2. JohnD

    JohnD

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    photo please of your switch

    outside, and the connections too
     
  3. DigbyTim

    DigbyTim

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    Thanks for such a quick reply. Here are pics of the new switch. The old switch is virtually identical.
     

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  4. JohnD

    JohnD

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    the switch looks OK though I don't see the brand.

    Do you think it could be mechanical friction? Does it sound like it clicks correctly, and the red indicator flag snaps into place?

    If you loosen the fixing screws holding the switch to its backbox (relieving ant twisting or pressure) does that help? The cables for a shower are very thick and stiff and can be difficult to push into place. You need a good deep backbox.

    If you loosen the fixing screws for the installed switch, and take a pic showing how the cables are positioned, it may give a clue.
     
  5. DigbyTim

    DigbyTim

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    I loosened the fixing screws - no joy. The backbox is 2 inches deep, so plenty of space there I think, especially as the cables move quite freely back into the ceiling. There is no click and there is no movement of the indicator. The cord just wont pull once it has been switched on.
    Here's a pic of it wired in. The feed is on the right of the picture and the shower is on the left.
    By the way - there is no sign of burnining on the original switch.
     

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  6. JohnD

    JohnD

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    that's the old switch, isn't it? it looks quite dirty.
     
  7. securespark

    securespark

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    It looks like it might be the old switch. The new one is different.

    I have had an issue with some switches, both plate and pull cord where they are cheaply constructed and if the conductors go too far in to the terminal, they obstruct the switching mechanism. Crazy but true. Trimming them shorter relieves the issue.
     
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  8. DigbyTim

    DigbyTim

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    You're right - it's the old switch. I had put it back in as the new wasnt making any difference. They both look the same though. I'll try shortening the wires that go in. Thanks.
     
  9. DigbyTim

    DigbyTim

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    Thanks Securespark, that has done the trick. I have no idea WHY it worked as I cant see any way in which the length of the conductors could obstruct the switch, but I just pulled one (the shower live wire) out about a mm and the switch is working fine now.
    I just wish someone would invent a quiet swicth that doesn't make a massive CLUNK everytime the cord is pulled!
     
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  10. DigbyTim

    DigbyTim

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    Forgot to say Thanks for your help too, JohnD.:)
     
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  11. opps

    opps

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