Off Topic and last resort to bug all you fine folks on here. Need some help badly. We had a new heat and air split unit with a heat pump installed 12/1. It uses one of those ecobee dumb thermostats. Well, there is nothing working correctly. We have it on a schedule and it works fine for a little bit in heat mode then all of a sudden the temp coming out of the vents starts to drop. It goes from 95 or so to upper 70s to eventually 60-65. All of this within an hour, hour and a half at most. It never goes back to blowing warm air. I have to change it from heat to aux (gas) and back several times messing with it for it to even sometimes start blowing warm again.
It is also on a schedule to drop the temp to 67 at night for cooler sleeping. It drops alright, right to 58 or so when we wake up in the night or first thing in the morning. Any help or suggestions appreciated either on the board or DM. Heat and air guy is useless at this point.