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vaillant ecotec 837

  1. C4rlos81

    Vaillant ecoTEC plus 837, BDR91 to nest Heatlink

    Hi all, I have read through as many similar posts as I can in regards to my dilemma, I couldn't see anything that was similar to mine. I have a Vaillant ecotec plus 837 with a Honeywell BDR91 and CM927. The vaillant is connected by a UK mains plug as opposed to it being hardwired with a 3amp...
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