Heating system works fine as far as we can tell but hot water runs hot and cold with eventual automatic switch off showing code 2 as the fault. Code 2 is 'overheat'. Have reset but reverts to same problem each time. Can anyone offer a view as to the cause please?
Thanks Dave. With that info. we have read the manual at some length and that tallies. But we're a little unsure how to flush out with a proprietary descalant and disconnect/reconnect the water pipes safely as it suggests.
May be we need to get a plumber in.
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