Dishwasher shows E13; unit may shut down unexpectedly or not power on consistently.

Safety first: Turn off the circuit breaker and verify power is off before opening any electrical compartments.

Step-by-step checks:

• Check household breaker: Ensure the dishwasher's breaker is not tripping repeatedly. If it is, do not reset more than once without investigating.
• Inspect junction box: Remove the toe-kick panel and open the electrical junction box. Verify wire nuts are tight and no wires are burned or loose.
• Power cord (if equipped): Inspect the cord for cuts, burns, or crushed sections.
• Voltage check: A qualified person can measure voltage at the terminal block to confirm correct supply (typically 120V AC in North America).
• Board inspection: If external wiring is sound, the internal power supply on the main control board may be faulty and require replacement.

Warning: Working on live electrical circuits is dangerous; if you are not trained, contact a licensed electrician or appliance technician.