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Vaillant TW3 boiler keeps coming on and off by itself

Discussion in 'Plumbing and Central Heating' started by malachy1954, 21 Aug 2006.

  1. malachy1954

    malachy1954

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    I have an old Vaillant boiler CW 25 T3, which keeps coming on and off of its own accord can any one help with this problem
     
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  3. weareleeds

    weareleeds

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    Is dhw pre heat switched on
     
  4. malachy1954

    malachy1954

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    I am not sure as the boiler is located 200 miles from where i am at the moment. If the switch is on would this be the cause and if so how often does the boiler fire up in this position.

    thanks

    Mal
     
  5. ChrisR

    ChrisR

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    ABout hourly iirc.
     
  6. malachy1954

    malachy1954

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    Thanks for the help.

    regards

    Mal
     
  7. Agile

    Agile

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    Hourly at this time fo year increasing to every 15 min during cold weather if the heating is off and its external ambient inside.
     
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