I have a recently installed combination of a Goodman electric package unit, and an ecobee smart thermostat.
This morning with the outdoor temp at 36, I was surprised when I peered out the window and saw that my compressor fan was not running (which told me my house was being heated by the electric heat strips in the unit rather than the compressor).
I was surprised because the thermostat was set up to only run the heat strips if the outdoor temp was below 35, and the stat itself was claiming an outdoor temp of 36.
Now I am wondering if the goodman package unit has a thermostat of it's own that switches over to electric heat strip at a certain temp.
Since mid to upper 30's is such a common overnight temp around here during the winter, this could make a big difference in my power usage. Just a few degrees one way or the other would change the percentage of my heating that was with the heat pump by a large margin.
I did some googling and can't find any detailed technical info about Goodman products on line. Just very basic stuff. They don't provide ANY tech support to customers, only through dealers. argh.