How would I know if the motorized valve is faulty? would that cause the boiler to switch off and not come back on even though the hot water has been run off?
Help. my central heating is playing up. I have a free standing, trianco oil fired boiler sited outside the house. Once the hot water reaches temperature the boiler switches off rather than diverting the heat to the central heating system. Having switched off the boiler does not come back on...