Thanks. I've e-mailed EON asking for help. Tried phoning but was waiting ages without reply. I'll update this thread if anything comes of it.
Not sure what you mean by "no HAN activity on the meter ....", as the HAN is now green when I plugged in the old Npower Duet II black display device. Are you saying that the HAN light should be green even if I unplug the Duet II?? Thx again.
Just realized that IHD is the Duet II. I've never plugged it in before. Never noticed the red light on the HAN before as we never had any issues sending smart readings. AFAIK, you can leave the IHD unplugged and nothing should be affected. If I plug in the IHD (Duet II), I can easily become obsessed with how much elec/gas I'm using 😄. The IHD does show how much gas/elec is being used. If I put the kettle on, I see the green elec bars shoot up and the blue gas bars do change also when central heating kicks in (but there is/was always a delay with the gas usage bars showing).
Last edited by UKMark1203; 31-10-22 at 14:10.