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Yeah agreed. Unfortunately I half suspected that but didn't want to be 'that guy' relying on Google to someone in the trade. Will find someone else going forward!

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...

That's fair enough, I'm almost certain from my Google research that it's the gas valve but the engineer suggested more than likely to be ignition. That was replaced and sure enough woke up to a cold house this morning . Like yours, the fault seems to be sporadic!

Did you ever resolve this? If so, what was it? Also having the same issue and going around the houses a little with engineers.

Think it all seems to be working now. I've reduced the pipe stat to around 5 degrees and it seems to be shutting down now within about 20 mins of the frost protection kicking in. I added some lagging around the stat as recommended also. Many thanks for all your help on here!

Very useful, thank you. Will give it a further test tomorrow morning and see how I get on!

Thank you. Yeah so when I tested it, I switched the hive off and turned up the frost stat to 30 degrees which in turn kicked the heating in. The pipe stat was set to 10 degrees on the return pipe but it only turned the heating off when I turned the pipe stat dial down a fraction despite the...

Another question if you don't mind! I've replaced the pipe stat (L641b1004) on the return pipe. I've tried setting it to both 10 and 20 degrees and the pipe heats up to what feels reasonably warm yet the boiler doesn't cut out automatically when temperature reached. If I turn the temperature...

I don't want to speak too soon, but this may be spot on! Yes there is a frost stat and pipe stat, I've turned down the temperature on the pipe stat so will see over a few days if that makes any difference. If not, will dig a bit deeper and see if wiring etc is correct. Will update either way so...

Yeah all the radiators were on. No comfort mode set and not on zonal heating. Wondered if frost mode is kicking in and then a fault is stopping it turning off.

Hours, came on the other morning at 1am and stayed on til I woke up at 5ish.

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...