Not much to it.
Make sure breakers in electric panel are on.
Make sure emergency shutoff switch at furnace is on.
Set thermostat to heat position.
Set desired temp above room temp.
If furnace is ok it will start sequence to get flame.
Inducer fan on.
Pressure switch closes (edit).
Glow plug or pilot lights.
Blower starts within a couple of minutes.
All assumes clean filters, motors lubed.
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