Hi
I have an oil fired boiler with the honeywell st6400c controller
When I press the extra hour button to get just a hour of heat in evening it turns on then immediately off again, if I keep pressing it, eventually it will stay on
Any thoughts please?
I have an oil fired boiler with the honeywell st6400c controller
When I press the extra hour button to get just a hour of heat in evening it turns on then immediately off again, if I keep pressing it, eventually it will stay on
Any thoughts please?