Kenmore Dryer Error Code E72

The E72 error code on a Kenmore dryer indicates a short circuit condition in the Outlet Control Thermistor circuit. The Outlet Control Thermistor is a temperature-sensing component that monitors the air temperature at the dryer's exhaust outlet. The control board uses resistance readings from this thermistor to regulate heating cycles and protect against overheating. When the board detects a resistance value that falls below the expected range, it interprets this as a short circuit and triggers the E72 fault.

At room temperature (68 to 77 degrees F, or 20 to 25 degrees C), a properly functioning Outlet Control Thermistor should measure between 4.9K Ohm and 6.2K Ohm. A short circuit in this context means the resistance has dropped significantly below that range, often approaching zero ohms. This can result from a failed thermistor whose internal resistance element has broken down, or from damaged wiring where two conductors in the thermistor circuit have made unintended contact with each other or with a grounded surface.

The most direct diagnostic approach is to disconnect the thermistor and measure its resistance with a multimeter set to the appropriate ohm range. If the reading falls outside 4.9K to 6.2K Ohm at room temperature, the thermistor itself is defective and must be replaced. If the thermistor reads correctly in isolation, the wiring harness connecting it to the control board should be inspected for pinched, melted, or chafed insulation that could be creating a short across the circuit.