Found system low on refrigerant pressures 40/250 Found breaker to emergency heat failed breaker is in the on position no voltage passing through try to turn off and turn back on breaker would not go past trip position something inside the breaker has broken need to replace. Added 2 pounds of 410 a refrigerant brought system pressures back up to 85/340 32 degree outdoor temp, 70 indoor temp Vents are pushing out 96 degrees without electric heat. With electric heat the unit will run 110° to 130° F Defrost operations are working properly Indoor coils are clean return filter is new