Alarms are never good, but are particularly bad when they are telling you that the temperature in a section of the greenhouse has dropped 5º below where the heating is supposed to kick in!
That’s exactly the situation we came in to this morning. The boiler had broken at some point last night, leaving our plants shivering in the cold. Using a variety of techniques, including good old electric fan heaters, thermal screens and harvesting body heat, we managed to keep the temperatures within acceptable boundaries all day and, best of all, our boiler is now back online. Hurray!