Electrolux Dryer Error Code 72

Error code 72 on an Electrolux dryer indicates a shorted NTC1 sensor condition. NTC1 refers to the primary Negative Temperature Coefficient thermistor, which is a temperature-sensing resistor used by the control board to monitor dryer temperatures in real time. In a properly functioning system, an NTC thermistor decreases in electrical resistance as temperature rises. A short circuit in this sensor causes the resistance to drop abnormally low or read near zero ohms, which the control board interprets as an impossibly high temperature reading, triggering the error code and shutting down the drying cycle as a safety measure.

The fault can originate at the thermistor itself, in the wiring harness connecting the sensor to the control board, or at the connector terminals. Physical damage to the sensor wire insulation can cause two conductors to contact each other, creating a short. Corrosion or moisture intrusion at connector pins can also produce erratic low-resistance readings. In some cases, the thermistor component itself has failed internally and is producing a shorted output regardless of actual dryer temperature.

Electrolux diagnostic procedures direct technicians to perform test 6 when this code appears. This test involves measuring the resistance across the NTC1 sensor and checking the associated wiring for continuity and insulation integrity. Comparing measured resistance values against the specified temperature-resistance curve for the sensor will confirm whether the thermistor itself is faulty or whether the problem lies in the surrounding wiring and connectors.