Kenmore Dryer Error Code F3E3

F3E3 means the inlet thermistor has gone open circuit, registering a resistance above 245k ohms. The control board interprets this as an air temperature below 18 degrees Fahrenheit, which is outside the valid operating range. The dryer stops the cycle because it cannot safely read the incoming air temperature. The thermistor itself, its wiring, or its connectors are the most likely sources of the fault.

It is not recommended to continue using the dryer while this fault is active. With a non-functioning inlet thermistor, the control board cannot accurately monitor air temperature conditions, which could allow the dryer to operate outside safe parameters. Address the fault before resuming normal use.

Resetting the dryer by unplugging it for a few minutes may temporarily clear the error display, but the code will return as soon as the control board checks the thermistor circuit again if the underlying fault is still present. A reset does not fix a failed thermistor or broken wiring. Proper diagnosis using the thermistor test procedure is necessary to resolve the fault permanently.

A knowledgeable DIYer can diagnose and often fix this error by following the thermistor test procedure (TEST #4a, page 15) with a multimeter. You would check the thermistor's resistance and inspect the wiring harness for loose connectors or broken wires. If the thermistor reads open circuit, replacing it is a straightforward repair. If the wiring or control board is involved, the job becomes more complex.

If only the inlet thermistor needs replacement, parts typically cost in the range of $15 to $50 depending on the model. Professional labor to diagnose and replace the thermistor generally adds $75 to $150. If the control board is at fault, total repair costs can rise significantly, often in the range of $150 to $350 or more including parts and labor.