Dishwasher displays E13; may be associated with communication issues between control modules on advanced models.

Safety first: Disconnect power before accessing the control boards.

Steps:

• Power reset: Turn off the breaker for 5–10 minutes, then restore power and try a short cycle. Sometimes this clears transient communication faults.
• Inspect connections: Remove the toe-kick and control panel to access the main PCB and user interface board. Check all multi-pin connectors for secure fit and signs of burning or moisture.
• Check for water ingress: Look for signs of condensation or leaks near the control boards. Address any leak sources before replacing electronics.

When to call a technician: Board-level diagnosis and replacement should be carried out by a qualified technician, especially if firmware or programming is required.