Dishwasher will not start; display shows E01 shortly after pressing Start.

Safety first: Disconnect the dishwasher from mains power by switching off the circuit breaker or unplugging it. Do not work on live circuits.

E01 on Siemens dishwashers typically indicates a failure of the main power module or control electronics.

• Step 1 – Power reset:
  • Turn off the breaker for 5–10 minutes.
  • Restore power and try to start a short program.
  • If E01 returns immediately, proceed to inspection.
• Step 2 – Check incoming power:
  • Verify the wall outlet or junction box has correct voltage using a multimeter (only if you are trained to do so).
  • Inspect the power cord and terminal block for burn marks or loose connections.
• Step 3 – Access the control module:
  • Remove the outer door panel (usually Torx screws along the inner edge of the door).
  • Locate the power module (often in a plastic housing at the bottom right or behind the kick plate, depending on model).
  • Check for visible damage: burnt spots, melted connectors, or a burnt smell.
• Step 4 – Connector check:
  • Reseat all wiring harness plugs to the control module firmly.
  • Inspect the harness for pinched or damaged wires, especially where the door opens and closes.
• Step 5 – Replacement:
  • If the board is visibly damaged or E01 persists after reseating connectors, the power module is likely defective.
  • Order the exact Siemens power module by model and E-number (printed on the door frame).
  • Transfer connectors one by one from the old board to the new board to avoid miswiring.

Warning: If you are not experienced with mains-voltage electronics, have a qualified technician replace the control module.