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Hi, welcome to Just Answer. My name is ***** ***** I look forward to helping you! The control monitors the outlet temperature of the exhaust by using a thermistor, an electronic sensor. If the control is reading the resistance of that sensor to be out of range, it assumes the machine is too hot, usually caused by a lack of air flow. So, if the vent is clear and the dryer is not hot, the issue is that the control thinks it is. It may be that the sensor is faulty, there is a poor connection in the circuit between the sensor and the control, or the control is faulty. The most likely is a poor connection or a faulty sensor. Do you have a meter to measure resistance with?
Sure! You will need to set the meter to read resistance in the tens of thousands.
May I please have your dryer's model number so I am able to provide you with accurate, model specific information?
I didn't see any numbers in your original post, please forgive me if I overlooked it. Give me just a few minutes to look up your schematic. Can you unplug the dryer and remove the rear panel from the control console, please?
Well, you could replace the sensor. It is inexpensive, available below.
That sensor is mounted on the blower housing and shown as K550 in the diagram below. It will require the front panel of the dryer to be removed to access it.