Package heat pump not working, customer is using package unit heat pump to heat up basement/shop area,,,,,,,,blowing 3 amp fuse, upon arrival found units breaker off, with 3 amp fuse holder jumper with aligator clips, durIn investigation, Putin in a resetanle 3 amp breaker to test unit, found ecm blower motor running with all thermostat wires disconnected from stat, check voltage and getting 24 bolts and also 243 volts, found black spot/burnt on back of board, new board need to installed then We run and test unit,