Kenmore Dryer Error Code tE4

The tE4 error code on a Kenmore dryer indicates a fault in the steam generator thermistor, which is the temperature-sensing component embedded in or connected to the steam generator assembly. This thermistor monitors the temperature of the steam generator to regulate heating and prevent overheating. When the dryer's control board detects that the thermistor circuit is either open (no continuity, indicating a broken wire or failed sensor) or shorted (zero or near-zero resistance, indicating an internal component failure), it logs the tE4 fault. Importantly, this code only appears during test mode, so it will not display during normal operation cycles.

The steam generator is responsible for producing steam that is introduced into the drum during steam-based drying or refreshing cycles. The thermistor within this assembly provides real-time temperature feedback to the control board. An open circuit condition typically results from a broken thermistor element, a disconnected wire harness, or a corroded connector. A shorted condition usually points to an internal failure within the thermistor itself, where the resistive element has degraded to the point of bypassing its normal resistance range.

Because the thermistor is integrated with or closely tied to the steam generator assembly, the recommended first diagnostic step is to replace the steam generator unit rather than attempting to isolate and replace the thermistor separately. This approach addresses the most likely source of the fault and avoids the complexity of testing individual subcomponents within a sealed or semi-sealed assembly.