Goodman heat pump, model GSH130361AD, Goodman AEPF series Air Handler, and a Honeywell T8411R t-stat.
After wiring and setting everything up, the A/C works very good. In heat mode the aux heat comes on but the outside unit does not start up. Emergency heat works well too.
The units are used with only a few hours on them. The T-stat is new.
ANY IDEAS?