Ducane heat pump-Was blowing cold air on electric and heat pump. Electric side would lose heat, blowing cold air, heat pump side lost heat because it was -5 outside. HVAC person repaired by replacing sequencher. Now seems to work fine on heat pump side, blowing warmer air than it ever has, but blows cold air on emergency/electric, still causing house temp to go down on electric heat. Did I maybe have more than one problem?