Kenmore Dryer Error Code E25

The E25 error code on a Kenmore dryer indicates an open circuit condition in the control thermistor. The control thermistor is a temperature-sensing resistor that feeds real-time temperature data to the electronic control board. When the control board detects that the thermistor circuit is open rather than returning the expected resistance signal, it triggers E25 and may halt normal dryer operation to prevent overheating or inaccurate cycle management.

The control thermistor should measure approximately 50K ohms at a given reference temperature, with an acceptable tolerance of plus or minus 10 percent. A reading that falls outside this range indicates the thermistor itself has failed. An open thermistor means the internal resistive element has broken, causing the circuit to read infinite resistance rather than the expected 50K ohm value. This type of failure is typically caused by heat stress, age-related component degradation, or physical damage to the sensor body.

If the thermistor resistance measures within the acceptable 50K ohm range, the fault lies elsewhere in the circuit. The wiring harness between the thermistor and the electronic control board should be inspected for broken conductors, corroded terminals, or loose connector pins. If the wiring checks out and the thermistor resistance is correct, the electronic control board itself may be misreading the sensor signal and will need replacement.