Kenmore Dishwasher Error Code F3E1

The F3E1 error code on a Kenmore dishwasher indicates an open connection or faulty component within the temperature sensing circuit. The temperature sensor, also known as a thermistor, monitors water temperature throughout the wash and heat cycles. When the control board detects an open circuit in this sensing loop, it cannot confirm that water is reaching the correct temperatures for effective cleaning and sanitizing, so it halts operation and stores this fault code.

The most common sources of this fault are a failed thermistor, a broken or disconnected wire harness leading to the sensor, or a corroded connector terminal in the temperature sensing circuit. Because the dishwasher interior is exposed to heat, moisture, and detergent chemistry over time, wire insulation can degrade and terminal connections can oxidize, both of which can interrupt the circuit and trigger F3E1. A completely open sensor will typically read infinite resistance on a meter rather than the expected thermistor resistance value.

Diagnosis should begin by running the temperature sensor check within the service diagnostics cycle to confirm the fault is active. After unplugging the dishwasher, use a multimeter to inspect continuity and resistance across the sensor itself, and then trace the wiring harness back toward the control board, checking each connector for corrosion, pushed-out terminals, or physical damage. If the sensor reads open or out of specification and the wiring checks out, the thermistor will need to be replaced. If the wiring is the issue, repairing or replacing the harness may resolve the fault without replacing the sensor.