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Bosch · Dishwasher · E27

Common troubleshooting mistakes

The electrical supply voltage is too low.

Diagnostic nodeE27COMMON-MISTAKES
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Use this as a diagnostic branchConfirm the exact model manual before ordering parts or opening the appliance.

Coverage: Bosch dishwashers that use E27/E:27; regional voltage thresholds differ.

GUIDANCE

Common troubleshooting mistakes for error E27

Common mistakes include assuming the code names a failed part, using instructions for another model family, repeated resets, and continuing after a leak or electrical warning.

Safe sequence

  1. 1Turn the dishwasher off.
  2. 2Confirm the plug is fully seated without opening electrical enclosures.
  3. 3Use a qualified electrician to check the supply voltage and circuit.

Stop and get qualified help when

  • Always stop if lights flicker, wiring smells hot or breakers trip
  • Do not measure mains voltage unless qualified
Primary sourceBosch UK — dishwasher E27 ↗Verified 2026-07-17 · manufacturer