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keston (ugh) fault, b26 but open vented

Discussion in 'Plumbing and Central Heating' started by exbg1, 13 Dec 2009.

  1. exbg1

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    :?: serviced a c40 keston friday. usual warped electrode ! all working ok as i finished, customer phoned me up today & said boiler stopped working & shows a B26 fault. this is low water pressure fault. as this is an open vented system, how can that happen,
     
  2. Keston

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    Link out the water pressure switch, if it fires up then replace it.

    simple.
     
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  3. HenryE

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    I have a C55 with a similar problem. How do I link out the water pressure switch?

    Thanks

    H

     
  4. twgas

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    You don't, this is classed a safety device so you need a RGI, who should be able to test it.
     

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