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Boiler burner light constantly on and shows D (hot water demand) on Ideal Logic 30

Discussion in 'Plumbing and Central Heating' started by sahilsaid, 10 Jan 2021.

  1. sahilsaid

    sahilsaid

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    I have this strange issue where my boiler shows a D letter and burner light is constantly on. I can hear the burner noise and central heating is not working since boiler never gets a break from filling the request of hot water demand.

    The boiler was installed in early 2014 and serviced regularly. Around a month ago, the boiler had its heat exchanger replaced.

    Does anyone have any idea what this could be? I have called gas certified engineer to come and have a look but he is too busy so not sure when he will turn up. Just wanted to see if I can get it to be fixed temporarily or does this sound like some part need repairing/replacing?
     
  2. cross thread

    cross thread

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    Turn cold water off , does it stop ?If so you have a leak or a tap on
     
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  4. sahilsaid

    sahilsaid

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    indeed it was a leak somewhere. Thanks
    We bought house few years ago so didn't know the pipe layout.
    Only thing I know is that the leakage was downstairs somewhere and water was going straight down to the floor. The plumber said it must a quite big leak for the boiler to recognise the demand and fire up the burner.
    Found the junction (T Junction?) upstairs where the pipe was being passed downstairs and put a stop there. Added a brand new pipe and isolated the leakage zone. The new pipe then connected to a junction downstairs where from which point we were sure there is no further leak.
    Plumber did all of the work above but I was watching learning few things while he was getting along with it.
     
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    cross thread

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