Turn on system to check for proper operation
Checking voltage/amperage on blower and inducer motor
Inspect blower assembly
Checking thermostat operation
Change filters
Inspect all wiring for proper connection
Check capacitors
Check for gas leaks
Check heat rise of furnace
Inspect heat exchange for cracks
Inspecting flue vent
Inspect ductwork
Inspecting burner assembly
Check for proper air flow