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Hi Please can anyone advise me. I have a Vaillant ecotec exclusive 838 pre-2012 model combi-boiler at home which is currently time controlled with a Horstmann Centaur plus C17, 7 day timer which is wired through a Vaillant VRT30 stat to terminals 3 & 4 on the boiler control panel, my VRT30...

Please can anyone suggest a reason or reasons why the RCD in my Proteus Centaur consumer unit trips out the electric supply for no apparent reason? This might happen at any time of the day or night any time of the year, sometimes every day for a few days & then it might be every few weeks, it...

Hi I am experiencing a malfunction with my Vaillant combi-boiler. The boiler control on the heating side is currently set up to be switched on and off via a separate room thermostat and a separate time clock, it has been working fine like this for years. (setting mode 1 as per instruction...