Bosch · Washer Moderate

E27 — Low Voltage / Power Supply Fault

Bosch's official US washer codes use an E:XX / F-code / icon format; a bare 'E27' is not in the official US list. The 'low voltage / power supply fault' explanation below is not confirmed on Bosch's US consumer page — verify against your model's manual.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
bosch-home.com ↗

How to fix it

  1. Plug the washer directly into a dedicated wall outlet (no extension cords or power strips).
  2. Verify nothing else is on the same branch circuit during operation.
  3. Measure voltage at the outlet while a cycle is running — should stay above ~108 VAC.
  4. Replace the outlet if loose or showing burn marks.
  5. Call an electrician if home voltage is consistently low.
  6. If voltage is fine, the control board's power monitoring is suspect — replace board.

Why it happens

Typical signs: Cycle aborts unexpectedly · Display flickers · Error appears during heat or spin · Lights in home dim when washer runs

  • Brownout / low line voltage Voltage drops below ~95 VAC during high-current phase.
  • Shared circuit overload Dryer, microwave, or other heavy load on same breaker.
  • Loose receptacle or worn plug Increased resistance at the outlet.
  • Extension cord in use Cord voltage drop trips the protection.
  • Failed control board power section Misreads supply voltage.

More Bosch washer codes

E01 E01 — Door Lock Fault E02 E02 — Motor Fault E03 E03 — Door Lock Fault E04 E04 — Water Inlet Fault E05 E05 — Heating Element Fault E06 E06 — Door Lock Circuit Fault

All Bosch codes → All washer codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: bosch-home.com.