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Discussion in 'Plumbing and Central Heating' started by Michal Harcarik, 10 Apr 2019.

  1. Michal Harcarik

    Michal Harcarik

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    Hi everyone, need some advice regarding my boiler, I had issues with hot water, sometimes not working, changing temperature while it was running, I thought it was temperature sensor. I have changed it but it made no difference. I've been told to clean heat exchanger as the boiler has displayed "no water or absence of flow" according to its manual. I have done that but now it won't work and display this fault. I'm attaching video of it.
    Any idea which would point me to right direction would be much appreciated. Thank you.
     
  2. Motman

    Motman

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    If you get a response, don’t expect it to be anything but abuse from here onwards.
     
    Last edited: 10 Apr 2019
  3. ianmcd

    ianmcd

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    Did you isolate the gas valve when working on the heat exchanger and havent turned it back on ?
     
  4. Michal Harcarik

    Michal Harcarik

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    Gas valve is on. I believe to be trapped air in boiler. So the water does not circulates. Therefore the boiler has gone to lock out. However if the pump doesn't run I can't clear it. Any suggestions
     
  5. ianmcd

    ianmcd

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    have you manually bled the pump ? is the condensing heat exchanger blled point top left hand side of the heat exchanger open ?
     
  6. Michal Harcarik

    Michal Harcarik

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    Yes, I've done it. Also checked the pump and it's free to move. But as it shows on video does not even try to spin pump just cuts off.
     
  7. nwgs

    nwgs

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    Are you getting voltage to the pump ?

    Is the pump proving switch making ? Remove the micro switch and press it with a small screw driver.

    Does it fire up then ?

    They can act like this when the pump proving is faulty.
     
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