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E50

Bosch Washing Machine

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Bosch Washer E50 Error — Water Level / Pressure Switch Fix

What it means

Bosch washer E50 error means a problem with the water level sensor or pressure switch — Bosch's code for the sensor that monitors water level in the tub.
Similar to E26 but on different sensor types or model variants.
Either the sensor is faulty or the pressure hose feeding it is blocked.

Affected Models

  • Bosch Serie 2 / Serie 4 / Serie 6 / Serie 8 washing machines
  • Bosch Logixx, Maxx, Classixx ranges (older naming)
  • Bosch WAW, WAT, WAY, WAQ model series
  • Bosch Varioperfect washers
  • Same codes appear on Siemens and Neff washers (shared platform)

Common Causes

  • Pressure hose between tub and sensor blocked
  • Pressure hose detached or split
  • Water level sensor (pressure switch) faulty
  • Sensor wiring loose at control board
  • Detergent residue in pressure hose distorting readings

How to Fix It

  1. Power-cycle the washer.

    Unplug for 60 seconds, plug back in.
    One-off sensor glitches sometimes clear on a clean reboot.
    If E50 returns immediately, the issue is hardware.

  2. Find and inspect the pressure hose.

    Remove the back panel.
    Find the small clear plastic tube from the bottom of the outer tub to the pressure switch (a small cylindrical part).
    Confirm both ends are firmly connected and the tube isn't pinched, split, or full of water.

  3. Blow out the pressure hose.

    Disconnect the hose at the sensor end.
    Blow gently to clear any water or detergent residue.
    Reconnect.
    Detergent gunk distorts the reading and triggers E50.

  4. Replace the pressure switch.

    If hose is clean but E50 persists, the sensor has failed.
    Replacement is a 30-minute job with the back open.
    Order matching Bosch part for your model.

When to Call a Professional

Pressure hose checks are owner-doable; sensor replacement is technician work.
Sensor part is inexpensive (£15–£30) but access requires removing the back panel.

Frequently Asked Questions

Are Bosch E26 and E50 different from each other?

They overlap heavily in cause and fix but appear on slightly different model variants.
E26 is more common on newer Bosch washers with analogue (linear) pressure sensors; E50 is more common on older washers with traditional pressure switches (which click between water-level positions).
Diagnostic and repair path is essentially identical: pressure hose first, then sensor.
If you have one, the fix for the other is the same.