Potterton Suprima lock out problem - overheat stat?

Discussion in 'Plumbing and Central Heating' started by sparkybird, 6 Feb 2012.

  1. sparkybird

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    Hi there

    Hope someone can help!

    Power was switched off to the boiler today and at switch on, it wouldn't re-ignite. Pressing the reset button resulted in unsuccessful tries then then 'lock out'. I read in the literature that switching off the power could result in the overheat stat operating - so I'm guessing that it might be this. Is there an easy way to re-set it? Can this be done by a sparks or does it need to be gas safe?
    The boiler was pretty cold when I tried to restart as it had been off all day
    Thanks

    SB
     
  2. simond

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    New circuit board......

    Poxi Batterton electronics again. Did you do an insulation resistance test?
     
  3. simond

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    I'm assuming you are a sparks? If the polarity was reversed to the boiler you would get precisely the problem you describe......
     
  4. sparkybird

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    Thanks Simon

    BTW I should have mentioned it's not my boiler!

    Do you mean IR test on boiler??? No. But I IR tested the circuit with the boiler isolated.

    Customer moved in just before Christmas and # mentioned that they had had to reset it once or twice.

    Is there a way to check the overheat thermostat first, before getting PCB replaced? I gather they ain't cheap...
     

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