I thoroughly recommend this fix — absolutely excellent. Heating working again within a few days. You are commenting using your Facebook account. Or look at my feedback, check out all the people that have been VERY happy with the fix.
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A bit of debugging seemed to be showing that the thermostat had stopped asking the heating to come on. So what to do about the thermostat? It all looked like it was working. I could also see the red light flashing when the controller was asking for the heating to trigger — but still no signal to the boiler.
That did the trick! All working perfectly then for around two weeks. Then I had a different problem. This time the red alarm led was always on. Again I went through the commissioning sequence but no luck. I reset the controller as per Internet comments — removing battery draws, etc, still no good.
I tried new batteries too, but still no good. Then I found a note that the last hand battery drawer was the display and the right hand drawer was the transmission circuits. So as the display was all fine, I wondered if there could be a fault with the radio side. The contacts looked a bit dirty, so I got the polish and a cotton bug out and gave them a clean. That did it! Even though official fault finding seemed to say the unit would be faulty, it was just dirty contacts in the battery drawer.
Drayton Digistat 2 User Instructions
DRAYTON RF2 PDF