When I woke up this morning the bathroom floor didn’t feel quiet as toasty warm as usual. It turns out the receiver box for the floor heating has died. It doesn’t appear to be anything as simple as the small fuse inside the box, so we will probably have to call in the professionals.
One major mistake in the design of the box is that there doesn’t appear to be anything as clever as a manual override when there is no power. Everything is run by valves along with small engines pushing on these valves – ie. no power, no heat.