RRepairGraph
Bosch · Dishwasher · E27

Diagnostic overview

The electrical supply voltage is too low.

Diagnostic nodeE27DIAGNOSIS
!
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

Diagnostic overview for error E27

Use the sequence meaning → symptoms → accessible checks → stop conditions. For E27, the current manufacturer-sourced summary is: Bosch UK states that E27 normally means the mains voltage is below the required level and recommends contacting an electrician rather than treating it as an appliance fault.

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