Boiler got out of sync with controller schedule

[clockworks]

After working perfectly for a week or so, I had something weird happen Saturday night. I went to bed a little later than normal, so thought I'd turn the radiator in the main bedroom up for half an hour before retiring. I used the app o my tablet to increase just that zone, but when I checked 15 minutes later, the boiler hadn't fired, and the radiator was cold, despite the manual override temperature showing on the HR92, and the room temperature being much lower.

I tried turning the dial on the HR92 up a couple more degrees. The boiler still didn't fire.
I manually increased another HR92, boiler still not firing.

I cancelled both overrides using the controller, and a couple of minutes later the boiler fired, and kept going. All zones were well above the temperature set in the schedule, all HR92s were closed, radiators cold, but the boiler kept running, just circulating through the uncontrolled radiator that's used as a bypass.
Cycling power to the BDR91 and boiler didn't fix it - as soon as the power was switched back on, the boiler fired again, with no heat being called for from the controller.

I used the "all off" quick action on the controller, then cancelled the "all off", and everything was working normally again. It hasn't done it since.

It looks like the BDR91 got out of sync with the controller, thinking it was on when it was actually off, and vice-versa.

The only thing that I had done differently was to use the remote app to override the schedule just before midnight. I wonder if the app is just a bit flaky, or if the time of day is significant? It seems odd that all the radiator valves responded OK throughout, but the boiler relay was working backwards.

[Richard]

Not 100% sure what going on, but sounds like a 'comms' issue.

Got any photos of the installation and the controller position (wide angle shots not close ups)?

[clockworks]

Comms check on the BDR91 gives 3 flashes, and everything seems to have worked fine - except for on that one occasion.
The Evohome controller is at the other end of the house, about 14 metres away, but there is "line of sight" between the controller and relay, through 2 wooden doors along the hallway.

[Richard]

Page 4 of the Honeywell evohome Installation Guide does say '300mm minimum away from metallic objects' and copper pipe is metallic. Have a read of this (http://www.honeywelluk.com/documents/Al ... reless.pdf) as it may help - RF is sensitive and when in operation mode I think it is becoming scrambled and depending upon direction it is coming from, I see you have other metal objects that could block the signal.

[clockworks]

OK, I'll try moving the relay to the left a bit.
Just to clarify, the Evotouch controller is directly behind me from where I was standing to take the photo, so no metal between the 2 devices

[Richard]

To clarify were you getting signal 3 when the evohome Controller was within 2-3 meters of the BDR91?

[clockworks]

No, that was from the other side of the house, about 14 metres away

[Richard]

Did you have a picture of the evohome Controller in its usual location (again wide angle shot please).

[clockworks]

Controller location