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You may very well be right because if the induced draft motor won't come on then the heatin cycle stops there. It makes me wonder about the board because of it doing the same thing even if it's not calling for heat. Thanks.
Usually when the furnace blower motor runs all the time
The limit switch or rollout switch is usually open or bad.
The furnace board is seeing that one of those switches is open, so it brings the blower on to try to get the heat out of the combustion chamber area, so the switch will close. But if the switch is bad and won’t close, the furnace board will keep the blower running continuously.
Induction coil heaters draw very high amperage (12-14 amps) when turned on. If your outlet is worn or old the heater plug prongs will not have a good connection and the current will jump or arc from the outlet to the heater plug prongs. This arcing causes tremendous heat, enough to melt the outlet and the cord end. First thing to do is change the outlet.