Originally Posted by
therealfronty
I am getting more and more instances of the boiler doing short cycling now, it happens where there is very low demand (typically less than 10%) and the TRVs aren't open enough to let any water flow, the bypass rad doesn't dump enough heat to stop the boiler locking out when the water overheats. It's very frustrating, I wish there was a way to stop the boiler firing with such low demands but I have no option to control that. I remember there is a setting somewhere when you have a boiler relay configured, but you seem to lose that setting when you configure two BDRs in a Y-plan configuration. It's so frustrating hearing the boiler firing for just 10-20 seconds then shutting down.