What Bosch Washer Error E23 or F23 Means

On a Bosch washer, E23 or F23 is a water-protection warning. Bosch's current US support identifies the condition as AquaStop activation. Its current washer error index describes the related -23 display family as water in the base and/or an appliance leak.

The protection system has responded to a water condition, but the code alone does not identify where water originated or which component needs repair. A dry floor does not exclude water in the washer's base.

When to Stop Immediately

  • Stop all programs: Do not start wash, rinse, drain, spin, or an empty test.
  • Close accessible water: Use building/service help if the tap requires moving a stacked unit or entering a wet area.
  • Avoid wet electrical access: Do not touch a wet plug, outlet, power strip, or control.
  • Preserve evidence: Photograph the complete display, E-Nr/FD label, first wet point, and cycle phase.
  • Do not disturb the base: Do not tilt, rock, dry, open, or bypass the protection area.
  • Escalate unsafe isolation: Use building maintenance or an electrician if water is spreading, the tap cannot be closed, water reaches electrical parts, the breaker trips, an electrical/burning odor appears, or isolation requires moving a stacked unit.

Do Not Confuse These Bosch Codes

Bosch codes are appliance-specific. Searching only Bosch E23 can lead to the wrong appliance instructions.

  • Washer E23/F23 or the current -23 family: Leak protection/AquaStop is active; water may be in the base or the appliance may be leaking.
  • Washer E18/F18: Bosch routes this to the drainage hose or drainage system. It is a different code and a different article.
  • Washer E16/F16/E34/F34: Bosch uses these for a door that is not locked properly at program start.
  • Bosch dishwasher E23: Bosch's dishwasher code page assigns E23 to a dishwasher drain-pump problem. That meaning must not be transferred to a washer.

The exact display format can change across control generations. If the machine shows a longer message, another suffix, or an app notification, capture the full screen and use the manual tied to the complete E-Nr.

What Diagnosis Must Confirm

Diagnosis measures base-water state and the AquaStop/protection input, then observes supply pressure, fill, dispensing, drum movement, and pump-out separately on the exact E-Nr. After the first wet point is repaired, the same stage must remain leak-tight and the protection input must report correctly before the code is cleared.

What to Record Before Service

  • Identity and message: Complete E-Nr/FD label and exact E23/F23/-23 or app display.
  • Timing and location: Program phase and first wet point, including no visible floor water.
  • Recent event: Hose/install work, movement, cleaning, oversudsing, backup, or outside spill.
  • Access: Stacked/closet condition and whether the water tap is reachable.

FAQ

What if the code appeared after water was spilled near the washer?

Record the spill's location and timing, but keep the washer off. The event may explain how water reached the area; it does not prove the washer's internal water connections are leak-tight or authorize a reset.