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hello, i have trouble with one radiator in the house, ever since the plumbers fitted a new boiler and radiators and new pipework the lounge radiator never gets hot all over , it gets hot at the top but the middle to bottom gets loop warm cold, tryed balancing the rads but no joy , switched all...

Hi, i have a vaillant ecomx 824e the trouble is 6 days ago the central heating as stoped working , but the hot water is working fine the flow pipe off the central heating is getting hot for about 2 metres and the rad above the boiler is getting loop warm if that. some times and not always a code...