E15 error appears and the unit shuts down; faint smell of electronics may be present.

Safety first: Unplug immediately if you smell burning or see smoke. Do not attempt to restart until inspected.

• Visual inspection: Remove covers and inspect the motor, heater, and wiring harness for burn marks, melted insulation, or discoloration.
• Isolate components: Disconnect the motor and heater from the PCB. Using a multimeter, check each for low-resistance shorts to chassis ground and between terminals.
• Check harness routing: Ensure wires are not pinched between plastic housings or rubbing against sharp metal edges.
• Inspect control PCB: Look for cracked or exploded components, especially power semiconductors and resistors. If damaged, the PCB must be replaced.
• Replace failed parts: Replace any shorted motor, heater, or harness. Only reapply power after all suspected faults are corrected and the unit is fully reassembled.