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Hi have a boiler mate 2000, problem is that the hot tap runs hot for 20 seconds than goes cold. Hve cheched the pump, have 240 volts on pump when tap is hot volts drop to 50 when the hot water goes cool. After it goes cool it stayes cool. Have tried the sensors and PCB. Gled tech think plate...

Recently taken out a potterton profile, the wiring was switched live and neutral from the ep2000 programmer. The vaillant requires a permanent live and neutral which I have done but unsure how to wire the switched live and neutral into the boiler? Please can anyone help as have phoned vaillant...