Dishwasher displays E14 and may not start the wash phase.

Safety first: Disconnect from mains before accessing the pump or control board.

• Inspect circulation pump: Access the pump and check for obstructions in the impeller area. Remove any debris.
• Check tachometer connector: Many pumps have a small tachometer connector separate from the power leads. Ensure it is firmly connected and not corroded.
• Test tachometer: Using a multimeter, measure the tachometer output while manually spinning the impeller (technician level). Replace the circulation pump if no signal is generated.
• Inspect wiring and board: Trace the tachometer wires to the control board and check for continuity. If wiring is intact and the pump is good, the control board may be defective and require replacement.