I own a Redring Dualheat unvented boiler.The heating and hot water are heated by electrical elements.A few weeks back the boiler stopped working completly,no heating or hot water.I changed 2 of the 20amp fuses on the PCB and it worked again until yesterday.On inspection I found that 1 of the fuses on the board had blown again.I noticed a very slow,slight drip coming from one of the connections where the element enters the tank and am wondering if the boards fuses are blowing when its becoming wet.When the programmer and stat call for heat,the pump runs but no pipes heat up.I have sealed the leak at the element connection but am wondering if the fuses still blow after this, would I be looking at changing the PCB. Also, I have tried various part suppliers to get a price for a board but nowhere seems to stock them.Does anyone know where parts for this type of boiler can be purchased?