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Additional question: When you need to change the VR setting, are you sure the old one is still in effect? Next time it happens can you first run the commands PR=V and DP=9D and report the results? Next time it happens, I'll check. Needed to put it on VR=4 yesterday to make it work; VR=2 and VR=3 di...

Any idea what could cause the gateway to intermittently need VR=2 or VR=3? Lately I regularly (every few days) need to toggle it for communication to be restored. The thermostat will report 'No communication' and no boiler messages are being decoded at that moment. So it seems the voltage is very cr...