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Central Heating tripping RCD?
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<blockquote data-quote="Phil Russell" data-source="post: 504677" data-attributes="member: 33396"><p>I am not electrically qualified but think I have a fair understanding of the basics. This is a puzzle to us: Over the past 3 weeks our RCD that controls upstairs lighting, downstairs sockets and central heating controls has tripped 3 times. We had the impression it was tripping in early morning so put a timer on the downstairs socket circuit. It went again this morning and the timer stopped at 6am; just the time the central heating comes on. Vaillant boiler, Dafoss timer/controller. So it seems the ch is most likely the culprit. Before 6am the ch is totally 'off' on the control panel (hot water and the radiator heating) so the automatic switch on at 6am is the total system. When this has happened I have reset the consumer unit at c 7am and there have been no problems. The system is also totally off in early afternoon and switches on again at 2pm. It has not tripped in the afternoon. I can see no leaks upstairs around the tank and pump/gate valves (?) in the airing cupboard. I have read it could be caused by condensation in the flue/boiler and this may fit given the cold nights recently and, of course, condensation will have dried up for the afternoon. We have not had this problem in previous years.</p><p></p><p>I plan to contact our central heating company to ask them to investigate ... do you think my amateur diagnosis is fair or am I missing a trick somewhere?</p><p></p><p>Advise welcome please, with thanks</p><p></p><p>Cheers, Phil</p></blockquote><p></p>
[QUOTE="Phil Russell, post: 504677, member: 33396"] I am not electrically qualified but think I have a fair understanding of the basics. This is a puzzle to us: Over the past 3 weeks our RCD that controls upstairs lighting, downstairs sockets and central heating controls has tripped 3 times. We had the impression it was tripping in early morning so put a timer on the downstairs socket circuit. It went again this morning and the timer stopped at 6am; just the time the central heating comes on. Vaillant boiler, Dafoss timer/controller. So it seems the ch is most likely the culprit. Before 6am the ch is totally 'off' on the control panel (hot water and the radiator heating) so the automatic switch on at 6am is the total system. When this has happened I have reset the consumer unit at c 7am and there have been no problems. The system is also totally off in early afternoon and switches on again at 2pm. It has not tripped in the afternoon. I can see no leaks upstairs around the tank and pump/gate valves (?) in the airing cupboard. I have read it could be caused by condensation in the flue/boiler and this may fit given the cold nights recently and, of course, condensation will have dried up for the afternoon. We have not had this problem in previous years. I plan to contact our central heating company to ask them to investigate ... do you think my amateur diagnosis is fair or am I missing a trick somewhere? Advise welcome please, with thanks Cheers, Phil [/QUOTE]
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