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Hi Tony The temperature dial doesn't seem to move. I'm sure it used to so that maybe indicates something is up. Just one diagnostic light. Flashing on off very rapidly, multiple times a second. Will search. Thanks.

Hi everyone, We have a mini c28. Hot water is fine. However central heating seems to go on and off. It fires up for 20-30 seconds then goes off. Does this every few minutes. However eventually it will come on and stay on. Usually in the evenings. Can anyone suggest what the issue could...