Y
yaryl
Hi,
Hope someone can help. Had a room thermostat fault develop on a Worcester Highflow 400 electronic boiler.
When the boiler is switched on (by the timer) and the room thermostat has reached the required temperature (in other words it is telling the boiler to stop centrally heating) rather than the boiler turning off you can hear a relay (on the left of the control panel) switching on/off every second and the indicator light by the central heating water temperature control flashes in unison. If the thermostat temperature control is turned up (so heating is required) then the boiler comes on and heating is provided as normal.
I have checked the thermostat with a meter and it appears to be switching as on/off expected as the thermostat is raised and lowered. But when the thermostat is telling the boiler to stop heating the boiler is cycling on/off every second. However if I disconnect the thermostat from the control board (either at the thermostat and or the boiler end) then the boiler remains off without cycling.
Anyone able to give some pointers to fault-finding if it's the thermostat or part of the boiler's control board?
Thanks.
Hope someone can help. Had a room thermostat fault develop on a Worcester Highflow 400 electronic boiler.
When the boiler is switched on (by the timer) and the room thermostat has reached the required temperature (in other words it is telling the boiler to stop centrally heating) rather than the boiler turning off you can hear a relay (on the left of the control panel) switching on/off every second and the indicator light by the central heating water temperature control flashes in unison. If the thermostat temperature control is turned up (so heating is required) then the boiler comes on and heating is provided as normal.
I have checked the thermostat with a meter and it appears to be switching as on/off expected as the thermostat is raised and lowered. But when the thermostat is telling the boiler to stop heating the boiler is cycling on/off every second. However if I disconnect the thermostat from the control board (either at the thermostat and or the boiler end) then the boiler remains off without cycling.
Anyone able to give some pointers to fault-finding if it's the thermostat or part of the boiler's control board?
Thanks.