1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Electric underfloor heating issue

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

  1. ToolSnob

    ToolSnob

    Joined:
    31 Dec 2015
    Messages:
    56
    Thanks Received:
    0
    Country:
    United Kingdom
    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

    Joined:
    27 Jan 2008
    Messages:
    13,878
    Thanks Received:
    1,203
    Location:
    Llanfair Caereinion, Nr Welshpool
    Country:
    United Kingdom
    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

    Joined:
    31 Dec 2015
    Messages:
    56
    Thanks Received:
    0
    Country:
    United Kingdom
    ok cool thought as much, thanks

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

    EFLImpudence

    Joined:
    7 Jul 2010
    Messages:
    28,468
    Thanks Received:
    3,057
    Location:
    Retired to:
    Country:
    Portugal
    It is now. :)



    Sorry.
     
  5. ToolSnob

    ToolSnob

    Joined:
    31 Dec 2015
    Messages:
    56
    Thanks Received:
    0
    Country:
    United Kingdom
Loading...

Share This Page