RE: Emergency Heat only & no air conditioning
I believe the "Emergency Heat" is a toaster coil, sort of a back up system if the heat pump should fail. When you say "Emergency Heat" only I guess you can't get any warmer than usual heating? Maybe the heat pump really failed too.
If it still heats when the system is set to "Cool", check if you're in "Dehumidifier" mode. Dehumidification is done by the cooling coil condensing the water vapour in the air and then heat it up again, so if the cooling coil isn't working you got heat only (if the toaster coil is not regulated by the T-stat and let to run). See if there's one and whether you can control it. Maybe the refrigerant "Freon" escaped through a leak in the coils.
Clement