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Faulty PRV? (wb 37cdi combi)

Discussion in 'Plumbing and Central Heating' started by lasors, 5 Nov 2015.

  1. lasors

    lasors

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    Hello all,
    My in-laws boiler shut down today, no hot water from taps or CH, error code E9 which is overtemp I think. Pressure gauge is zero, tried refilling but the gauge only shows a slight increase and then the water just flows out of the copper pipe on the outside wall.

    Am I right in thinking this is a faulty pressure release valve causing this?

    Likely cost of replacement?

    Thank you very much for your help.
     
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  3. 45yearsagasman

    45yearsagasman

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    PRV's don't fail for no reason. The cost will depend on rectifying the fault. It maybe expansion vessel charge low, but it needs investigation.
     
  4. lasors

    lasors

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    I think the prv was stuck open. I've reset it and it appears to be ok now. I will keep an eye on it and if it happens again I will call someone in. Many thanks
     
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