Just to put this to bed in case anyone finds this via google with the same issue - heard back from Sales support and apparently older models of the RXBC605 won't work with the IT500BM as it needs the newer firmware - unhelpfully though the model number stays the same regardless of the firmware...
Hi all, got a bit of an odd one and not sure the best way to sort it.
Boiler is a Baxi Duotec combi 33 which has been fine since we got it, 'stat setup was a Salus rxbc605 receiver on the boiler, with a battery powered RTX501RF(TX) 868mhz thermostat - nothing fancy but did the job OK.
The...