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F31

F31 — Maximum water level exceeded

Bosch · Washing Machines

What does F31 mean?

The washing machine has filled with too much water, exceeding the maximum safe level. This can happen if the pump is blocked, the drain hose is blocked, or the pressure sensor is incorrectly adjusted.

Common Causes

  • Pump is blocked
  • Drain hose is blocked
  • Magnetic valve malfunction
  • Incorrect pressure sensor adjustment
  • Water removal system blocked

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and clear any blockages in the pump and drain hose.

  2. 2

    Verify the water supply valves are functioning correctly.

  3. 3

    Check the pressure sensor adjustment and function.

  4. 4

    Restart the program after addressing potential causes.

Browse all codes in this manual (47)
Verified technical data. Last updated: April 2026

Related Faults

E02E02 — Motor problemE67E67 — Incorrect module encodingF01F01 — Door not closed or laundry obstructing door
Source: Bosch Washing Machines
Open Manual (Page 4)Search more codes in this manual