OK so I looked at the microswitch last night and realised it was set into the middle position.
Have changed to be locked in to auto and heating came on first time last night without restarting the boiler.
However in the early hours of the morning from 0500 onwards and throughout the day the...
Hot water is set to auto and comes on between 0700-0730.
Good idea with that test though, will set hot water to continuous next time it happens and see if heating kicks in.
No fault codes seen on the boiler or errors on any other component. The only thing I noticed in the diagnostics menu is that heating mode status = blocked when it doesn't turn on, then I restart and it changes to released when it starts firing. However I looked this up and all that means is...
It has become a common occurrence that my boiler is failing to respond when the thermostat kicks in.
I hear an audible click from the heatlink when thermostat is turned up but nothing else happens.
Our heating programmer next to the water cylinder is set to continuous and all looks OK.
The...