LG Dryer Error Code tE4

The tE4 code on an LG dryer means the steam generator thermistor has been detected as open or shorted during a diagnostic test cycle. The thermistor is a temperature sensor built into the steam generator assembly. This fault only appears in test mode, not during normal drying cycles. It indicates the control board cannot get a valid temperature reading from the steam generator.

Because tE4 only displays during test mode and not during normal operation, your dryer may still run standard drying cycles without triggering this code. However, the steam function will not operate reliably with a faulty thermistor since the control board cannot properly monitor steam generator temperature. It is best to avoid using the steam features until the fault is resolved.

A reset may temporarily clear the tE4 code from the display, but it will not resolve the underlying hardware fault. Because the thermistor is physically open or shorted, the fault will return as soon as a diagnostic test cycle is run again. Clearing the code without replacing the faulty component is not a lasting fix.

A knowledgeable DIYer can address this code by first checking the wiring harness and connectors leading to the steam generator for visible damage or loose connections. However, if the wiring is intact, the repair requires replacing the steam generator assembly, which involves disassembling portions of the dryer cabinet. If you are not comfortable with appliance disassembly, a qualified technician is recommended.

Repair costs depend on whether the fix requires only wiring repairs or a full steam generator replacement. A steam generator assembly for an LG dryer typically costs in the range of $80 to $200 for the part alone. Adding professional labor, total repair costs can range from $150 to $350 or more depending on your location and service provider.