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    S.53 Error Vaillant Ecotec 438

    Hi, I am hoping someone here can help me, as this issue is driving me and my family mad,below are the facts. We live in a 5 bed detached house C. 2500sqft, we have 16 radiators in the house: 3 Towel rails, 7 down stairs, and 6 upstairs. The downstairs and upstairs radiators are all double...
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