I have a 1999 UK direct gas central heating system. Both the how water & central heating work when programmed independently. When the programs overlap, the systems just pule on and off about once per second? The programmer is a Danfos FP715 and appears to be in order.
Has anyone seen this – do you know what might be wrong?
Given you are not a qualified gas man I suspect you would be better to go find a copy of the instruction manual for the controller then if all else fails get a Corgi Fitter to help ya.
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