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    Valiant ecoTEC plus 837 CH not going past 50

    My HW is fine, nice and hot and steady. The CH is fine, but the boiler is only heating to 49/50 degrees, which makes the rads only slightly warm. I have had 3 heating engineers round from British Gas. New main pcb. New pump. Each time they have left and said to my Wife, “it’s fixed”. When I come...
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    Nest on Vaillant ecotec plus 630 H sys A

    I’m looking to add a Nest stat and have been looking at how the current system is wired. I have a Honeywell stat that sends to the boiler. The boiler is in the garage and the programmer and tank are in the bathroom above the garage. The junction box by the boiler has mains power, going to the...
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    Valliant ecotec not reaching flow rate target temp

    The outside temp is approx 10 degrees, but the house is a little cold at 16 degrees, so I thought I'd put the heating on for a bit, but the boiler is only show 38 degrees and the only way I can get the rads to get hot is to put it in chimney sweep mode. The boiler is coming up to a year old and...
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