I suggest unplugging the dryer and checking the wiring connection of the
thermistor to the electronic control board. The thermistor attaches to
the control board on the P2 connector (red/white and black wires on
pins 5 and 6).
The image below shows the procedure for accessing the
control board in this dryer (click image for zoom). If the connection is okay, pull the
connector off of the control board and check the resistance through the
red/white wire and black wire with a volt/ohm meter (with the dryer
still unplugged). You should measure about 10K ohms (10,000 ohms) at
room temperature. Make sure that your meter is set to the proper range.
If you read infinite resistance (open), then you could have a wire
harness connection problem between the control board and the thermistor.
Check the resistance across the leads of the thermistor (with at least
one wire removed from the thermistor). If you measure normal
resistance (10K ohms) at the thermistor, then you will need to repair
the wiring connection between the control board and the thermistor.
If
you measure the proper resistance through the thermistor circuit at the
connection to the control board (red/white wire to black wire on the P2
connector), then the electronic control board is bad and will need to
be replaced.
Hope helps.
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