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I have a Climapro RF with an Ultracom 24 hxi. The Climapro worked fine for 3years but then developed the intermittent fault reported in various posts, that is the controller and receiver lose contact , the boiler reverts to continuous operation limited only by the boiler stat, and the house and...

I have just power flushed my microbore system prior to fitting a new boiler. The system was working OK with no cold areas in the rads and no banging in the boiler . The dump water ran clear from each rad and from the final system drain. After removing the old boiler I found that the water...