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Looks like your draft inducer fan motor is bad. You should be able to hear it running, especially if you put a screwdriver against the center of the motor and place your ear against the handle (its like a stethescope). The hum and the heat are my clues. If you have an ammeter you can check the amps on the power wire to the motor; if it is running it will show something like 2 or 3 amps, if its stuck it will show more like 6 amps. Its called 'locked rotor amperage'.
Also, if you have access to your exhaust pipe outside, it should blow a piece of toilet paper in your hand if the motor is running. The inducer motor is a high loss item on high efficiency furnaces.