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Discuss Immersion timers keep failing in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. Subby
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    Subby EF Member

    Location:
    Wales
    Hi all .
    Have been to change an immersion timer for a Santon premier to210e invented cylinder.
    This cylinder has a 3kw immersion element (240v)
    I have fitted two different timers to replace the original but they have both failed after a few days of operating.
    After a few days u no longer get 240v at the switched live terminal in the timer when the timer is calling for heat. This happened to both the timers I fitted (both 16A load rating) one mechanical from the electric merchants, one lap digital one from screwfix.
    Why are the timers failing? The element works fine when I link out the timer. Thanks in advance.
     
  2. wirepuller
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    wirepuller Forum Mentor

    Location:
    south uk
    Probably because they are crap.
     
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  3. Subby
    Offline

    Subby EF Member

    Location:
    Wales
    Thanks for reading my question . What would cause these crap timers to fail in this way? The electrical merchant assured me the one he sold me was the best quality one he had (T104-c)
     
  4. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    Loose connections?
     
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  5. marc8
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    marc8 Electrician's Arms

    Location:
    Essex
    Business Name:
    MTS Electrical Ltd
    have you checked the supply from fused spur / double pole switch make sure no loose connections ect? same with immersion have you IR tested the element & made sure connections not burnt out & secure?
     
  6. westward10
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    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Top Poster Of Month

    Location:
    Northamptonshire
    What was wrong with the original, same problem?
     
  7. Dave OCD
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    Dave OCD Forum Mentor

    Location:
    Cornwall
    Business Name:
    Hendry Electrical Services
    Some of the timers out there which are supposed to be rated at 3kW or higher aren't great. For years I've only used the Timeguard [Formerly Smiths?] version on Immersion Heaters, a bit old school but simple for the user and reliable in my experience.
     
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  8. wirepuller
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    wirepuller Forum Mentor

    Location:
    south uk
    I cant see loose connections causing the internals on the timers to fail, you'd see evidence of that with charred connections.
    It's part of life now going back and changing rubbish gear, possibly several times. I had a run of timeguard timers which failed resulting in 3 return visits for FA. Also had a number of 105va LV trannies fail on one particular downlight. 4 return visits and the last one has now been in for 3 years and still going.
     
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  9. Subby
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    Subby EF Member

    Location:
    Wales
    There were no loose connections and I believe there was the same problem with the original
     
  10. Subby
    Offline

    Subby EF Member

    Location:
    Wales
    The immersion heater works fine with the supply straight from the fused spur
     
  11. marc8
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    marc8 Electrician's Arms

    Location:
    Essex
    Business Name:
    MTS Electrical Ltd
    not the internals of the timer, the supply to the timer if loose could be causing more current draw through the unit. just a thought
     
  12. westward10
    Online

    westward10 In echoed steps I walk across an empty dream. Staff Member Moderator

    Top Poster Of Month

    Location:
    Northamptonshire
    Test the element including a load test.
     
  13. Andy-1960
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    Andy-1960 Electrician's Arms

    Location:
    Wolverhampton
    Have you clamped the heater to see what current is being drawn?
     
  14. mattg4321
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    mattg4321 Electrician's Arms

    Location:
    South East
    • Like Like x 3
  15. Murdoch
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    Murdoch Electrician's Arms

    Location:
    Woking
    ^^ wot he said.
     
    • Like Like x 2
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