Check the breaker that it is on first. Don't be afraid to turn it off and back on just to make sure.
Depends it could have a standing pilot, it could have a hot surface ignitor, or a spark ignitor.
How old is the unit? Is it an 80% or a 90% gas furnace? If you don't know how to tell one will have a metal exhaust the other will have PVC for the exhaust.
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Fanaticism is nowhere.
There is no tenderness or humanity in fanaticism.
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