Thanks to 45 years a gas man. I will check the cylinder stat out first.
I think your second idea may be the answer (crud round the phile)
I am going to get the thermostat I last removed checked in work to see what temp it starts switching at. If this is in a reasonable range lower than...
Its fully pumped central heating and hotwater. S plan if i remember correctly.
All the valves open when switched but the radiators or the feed to the cylinder get very hot - even when on minimum on boiler thermostat.
Cheers
I have a Hideaway 80BF boiler, Last winter I noticed the water temperature was high even on minimum. I changed the boiler thermostat for one I purchased on line but the problem remains. I have today again changed the thermostat for one I purchased from a glow worm spares stockist so it is a...