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Thanks for advice I have checked red thermal cut-out button - OK Is the indirect thermostat the little bullet shaped temperature probe pushed down inside the cylinder insulation, please? How do I check it? As a check, I have even tried to order one from both Heatrae Sadia and...

Can anyone suggest why my 7 yr old Y plan system has suddenly stopped giving domestic hot water please? Despite the programmer calling for hot water and central heating when coming on at 7.00am, only the heating comes on - and I have to use the immersion heater to get hot water. The three...