Kenmore Dryer Error Code E74

The E74 error code on a Kenmore dryer indicates a short circuit condition detected in the Inlet Control Thermistor circuit. The inlet control thermistor is a temperature-sensing resistor positioned to monitor incoming air temperature at the dryer's inlet. The dryer's control board continuously reads the resistance value of this thermistor to calculate air temperature and regulate the heating cycle. When the control board detects resistance that falls below the expected operating range, it interprets this as a short circuit and triggers the E74 fault to prevent potential overheating or component damage.

At room temperature (68 to 77 degrees Fahrenheit, or 20 to 25 degrees Celsius), a properly functioning inlet control thermistor should read between 47,000 ohms and 66,000 ohms. A short circuit condition means resistance has dropped far below this range, often near zero ohms, which signals to the control board that the sensor is no longer providing reliable temperature data. This can result from a failed thermistor, damaged wiring insulation causing conductors to contact each other, or a connector that has shorted internally due to moisture, corrosion, or physical damage.

Diagnosis begins with disconnecting power to the dryer and using a multimeter set to the ohms range to measure resistance directly across the thermistor terminals. If the reading falls outside the 47K to 66K ohm range at room temperature, the thermistor itself is faulty and requires replacement. If thermistor resistance is within spec, the wiring harness between the thermistor and the control board should be inspected for pinched, burnt, or chafed sections that could allow two conductors to contact each other and create the short.