I have tried to install Honeywell 7500d thermostat. I get heat pump heat but no emergency heat although the termostate is calling for it. The installation manual says to see authorized agent if I have a dual 0/b on existing thermostat and another wire is attached to common.
As of now, I have the following wiring: r to r and rc (bridged). O to o/b, y to y, g to g, blue to common, no L wire connected, w2 to e and aux bridged.


How do I wire it? Thanks.