Sticking on cycle due to no water heating.Heater ok but no power supply.Heating stat ok safety stat ok,heater pressure switch ok.What am I left with,diagram may help
Found it.The thermostat was intermittent,(tapped the connector block and it caused the heater contact solenoid to chatter.In fact the actuating arm for the switch had displaced itself on the solenoid arm.changed the thermostat,sorted the actuator and jobs a good un.