Originally Posted by
RedEarth
TRV's generating an override signal is standard Evohome functionality, that's what the dial on the top of the TRV is for. I suspect what's happened is that your TRV has erroneously generated some kind of radio message (possibly due to low batteries?) that the hub has interpreted as a genuine override signal. You can disable local overrides on each zone in the installer menu on the hub (Zone Configuration > select the zone > Parameters > local override), I don't know whether it would solve your issue but it might be worth a try.