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Bosch · Dishwasher

Bosch Dishwasher error E27

The electrical supply voltage is too low.

Error codeE27Also: E:27
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Stop and make safeBosch 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.

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

What this code usually means

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.

BrandBosch
ApplianceDishwasher
ConfidenceManufacturer sourced

Safe checks, in order

  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.

Common symptoms

  • Cycle may stop or fail to start
  • E27 appears during low-voltage conditions
  • Other electrical devices may behave abnormally

Possible causes

  • Insufficient mains voltage
  • Supply circuit problem
  • Loose or unsuitable electrical connection

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