Okay, first off it is not a motor, it is a small board with 4 different length coils of wire placed on it. It is called a resistor pack, and it is in the circuit between the blower speed switch on the dash and the blower motor. Car makers usually place them attached over a small hole in the heater/AC case under the dash, so that the small coils get some air blowing across them. They get hot when used because the small coils create resistance to current passing through the wire.
If your 1 and 2 speed coils are burnt out, a new resistor pack will make all settings work again. Look for a multi-wire connector up under the dash on the heater/AC case. If it is retained by two screws, that is the resistor pack.
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