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Electric underfloor heating issue

Discussion in 'Electrics UK' started by ToolSnob, 27 Nov 2017.

  1. ToolSnob

    ToolSnob

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    Hi there

    Got a problem with my electric underfloor heating that my builder installed in 2013

    It's a Heat Mat installation below tiles, controlled via a KNX switch that turns it on for a set amount of time (via a KNX actuator). It's in the bathroom but there doesn't seem to be any cracks in the grouting etc where water could have got through.

    So when I turn on this specific EUFH circuit it now it trips the RCD. All the other EUFH circuits on the same KNX actuator work fine.

    I did have the EUFH in another room fail about two years ago, but in that case the floor didn't heat up, and it didn't trigger the RCD (the engineer found a break in the mat heating wire and repaired it).

    Does this issue sound like it's a faulty mat again or is there something else that I should double check before calling Heat Mat and digging up tiles? Fuse spur fuse is fine. Thanks
     
  2. ericmark

    ericmark

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    It likely does mean mat has failed. But you need some testing equipment to be sure. Since the meters cost so much it is not really a diy job.
     
  3. ToolSnob

    ToolSnob

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    ok cool thought as much, thanks

    what a headache... next time wet underfloor heating system!
     
  4. EFLImpudence

    EFLImpudence

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    It is now. :)



    Sorry.
     
  5. ToolSnob

    ToolSnob

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  6. DIYnot Local

    DIYnot Local

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