If furnace doesn't ignite, there could be air in the lines. Usually clear those out by burning the stove for a few minutes. Also see if the water heater lights up. It could be bad igniter, a bad sail switch or as someone mentioned a low air flow not closing the sail switch. But it sounds like you have plenty of air flow.
I would turn it on, turn the thermostat up above room temperature and go outside and listen to what the furnace is doing. You should hear the igniter clicking. See if it does and if it ignites and keeps blowing out, or just doesn't ignite at all, or if there is no clicking sound whatsoever. These symptoms will guide you or you can post your findings here.
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2016 FR Forester 2401R
Towing 2014 Honda CR-V
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