I have a Vailent Combi boiler , The Central heating is fine , but the Domestic hot water has become colder over a period of time, The flow of water is not any less, but the water is not hot any more, just a little warm. When I opened the Combimate container where descaling balls are placed, it was just full of hard white scale, I cleaned it all, but the problom still remains, What could be the problom, and if it is the scale , why flow of water not effected at all ?
DiAPHRAGM VALVE OR MICRO SWITCH BEST OF LUCK
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