The thermistor is located near to the heating element(pt.40) and motor(pt.6). The thermistor/holder assembly is part 31/31in picture below:To get the full part manual click here. The assembly is at pages 4/5.Here the part.
To test the thermistor remove it from circuit and read Ohms at its terminals. If the thermistor is good it must read zero or very low impedance. If it reads open, then it is broken.
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