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Hello I have a Valiant 831 EcoTec Plus fitted by previous owner in 2013. This winter we've sporadically had no heating/hot water with F28 and F54 errors both being displayed. This has always been first thing in the morning and generally when temperature have dropped. We've had a heating...

Hello We have a Valliant Ecotec 831 in the loft. A few times last winter and more regularly this last week or two the boiler switches itself on and stays on. It's connected to Hive and that is switched off on the schedule, the only way to reliably stop it heating it to turn off the boiler...