Hi Model numbers are Siemens RDF10 and the new thermostat is Honeywell T6861. the thing is in the old siemens there are two Neutral (white and blue) but only one N in the new thermostat
HiI'm changing my old Siemens thermostat to a new honeywell one however i'm struggling with the coding as it is different. can someone help? I have added the images for the old wiring and the new one and what i could match from the manuals however not sure where to put the N wires and the yellow...