Bosch Washing Machine E20/F20 error code

The washer detected heating happening when it should not, or the heating system behaved unexpectedly. The machine stops as a safety precaution.

Also shown as: E20, F20

Last updated: September 30, 2026

Quick answer: Bosch washing machine error code E20/F20: unexpected heating detected by the washer. The most common cause is heating circuit or temperature-control fault. Try this first — reset the machine. If that does not clear it, call customer service. If the code persists, call a qualified technician.

What causes the E20/F20 error?

  • Heating circuit or temperature-control fault
  • Fault in the electronic control of the heater

How to fix Bosch E20/F20 — step by step

Work through these in order, from simplest and safest first. Stop as soon as the code clears.

  1. Reset the machine
    Turn the machine off and back on; Bosch's official guidance is that a simple on/off reset may clear a one-time E20/F20 fault.
  2. Call customer service
    If the code returns, contact Bosch customer service to book a service appointment, since this is not a user-fixable fault.

When to call a technician

Stop and call a qualified technician if any of these apply:
  • The code appears again after the reset
  • The water feels hot when the cycle should be cold
  • You smell burning or see smoke - switch off and call service immediately

Frequently asked questions

What causes unexpected heating in a washing machine?

Usually a fault in the heating circuit or the electronics controlling it; Bosch treats it as a service-level issue rather than a DIY fix.

Sources

Every meaning and fix above was checked against official manufacturer documentation:

FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.

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