Have HVAC Questions? Ask an HVAC Expert for Answers
So far it sounds like a heat pump with a clogged up outside coil (or a frosty one) and not enough air flow across the indoor coil, or a dirty coil. And possibly over charged with refrigerant.
Tell me about how old the system is, and when the indoor and outdoor coils were last cleaned... and a bit of history on the system.
We can go from there