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A couple of days I switched on my Sunvic 107XL programmer for central heating. The programmer now makes loud clicking noises and flashes at random times during the switched on period. It's like it switches on/off in a loop for a few seconds or minutes failing to stay on, then stays on for...

I know next to nothing about thermal storage systems but the Electramate 2000 in my new flat behaves in a funny way. I don't see how I can have the system on, supplying hot water on-demand as recommended, without having two specific radiators (in the hall and the bathroom) getting hot. The...