Customer called about his system not running. Checked outdoor unit and have 240 volts from disconnect and at contactor. Force unit on and took mega ohms of compressor. Mega ohm reading was 1.1, 1.5 and 2.9 mega ohms. Checked indoor unit in coming voltage and read 0 volts. Checked leads with ground and got 120 and 11 volts. Also transformer has a burnt smell to it. Checked electrical panel breaker connections and both breakers to indoor is sending 240 volts. Checked blower and found it grounded. Saw the heat stips are burnt out as well. Checked indoor discount and found it destroyed maybe from an arch or back surge from the unit.