Update - Just as a test, I've replaced the NEST with the old Thermostat. Happy to report that this old thermostat unit is able to run the heat pump while using AUX heat ( ... not one or the other !) We easily heat the house now to our preferred temperature. The house has been extremely cold over the years.
The posts that were jumped together were R RC (which is 24 Vac power from heating transformer & 24 Vac power from cooling transformer) The other Thermostat shows it as the most common connection method when using Heat Pump with forced air and AUX heat (in the furnace).
Furnace side is 1.5T & typical connections, with the W1/W2 posts are jumped.
Earlier in an attempt to boost the heat from 64 degrees max out of heat pump, the recommendation was made to remove the old heating element in favor of larger one (better suited for our hourse). This required a sub-pannel install ($$) and 60A circuit to the heating element. Sadly, after install, our NEST wasn't able to utilize the AUX heat while heat pump was active? The AC tech left after installing the larger Heating Element in the Furnace saying " IT should be working, when we set it to anything above 78 degrees, AUX heat should kick-in and you'll feel it in the air from the vents ... it will be warm.
All for this update, I'm about to take the nest to beach house. That house only deals with Cooling in the Summer.
Truthfully, I expected more of a response from Google Support with regards to this obvious issue with my config and NEST Gen3. Unless I have a wiring issue or misconfiguration somehow, I can say it's caused issues for me not being able to heat the house. My time spent on this issue has been enormous at this point.
Mark
