DHW Pressure Differential Valve Corrosion

Discussion in 'Plumbers' Talk' started by iRACKERS, Sep 28, 2021.


    iRACKERS New Member


    I'm looking for some advice on a 17 year old boiler (BAXI 105 HE) & whether it's sensible to fix or replace.

    The issue yesterday started out as a leaking filling loop at the final check valve, which I replaced.
    When re filling the boiler it started to not hold pressure, a wiggle of the pressure relief valve initially didn't fix, but it appeared to resolve itself within an hour.

    Now there's an issue where hot water isn't flowing. Taking the front off again it appears as the push rod on the DHW Pressure Differential Valve has seized & not pushing the microswitch

    (Page 44, https://www.baxi.co.uk/our-boilers/...hash=2D0AD0223DC5AADA00F9C57AAC53F69A025066DA)

    Is it worth spending the money for an engineer to fix it, I imagine in the ballpark of £300. Or is it time to replace?

    Alternately, It does seem to be a straight forward fix. Is it something I could do myself as a competent DIYer.

    Thanks in advanced

    Attached Files:

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice