My system has worked largely flawlessly for two years now.
Brief overview: one BDR91 that switches a UFH zone and one that operates the rest of the rads which are all contolled by HR 92s.

Today the BDR 91 that switches the heating to all of the rest of the house failed to activate (no green light etc). Manually activating it works just temporarily even after clearing and rebinding to Evotouch. Does the fact that it works even for a short period mean that it's the likely problem?