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Ah, mystery solved. The boiler completely packed in last night (no hot water, no heating). I had a maintenance person come this morning, and the pcb is shot. I had started to suspect the control circuitry, so it's nice to know that an educated guess wasn't far from the mark! Looks like it'll be...

The heating doesn't come back on, but the hot water is very hot.

No difference. I don't think it is due to the system pressure because it was working fine last week, despite the fact that the pressure gauge was pretty much at the bottom of the scale.

Hi all, I've got a peculiar (well, to me at least) problem with my central heating, and I was wondering if anyone had any ideas as to what the problem might be. I noticed it just this morning. When the heating is turned on (and the room temperature is below the thermostat temperature), the...