Can anyone advice me , I have a Honeywell control to my central heating and hot water, the problem is although the heating side is set at OFF, the radiators are heating up. Any Ideas?
As above, sounds as though you have a faulty 3 port valve. You may get away with replacing the head or even just the syncron motor, if you have to replace the complete valve you may have to drain the system down.
Too little info given about system, hence guesses for answers. They might be correct, however they may be wide of the mark. What is your Honeywell control?
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