Bosch Washing Machine E33 / F33 Error Code

Bosch Washing Machine E33 / F33 Error: Detergent foam has been detected — too much or old detergent was used

When your Bosch washing machine shows a E33 / F33 error, it is indicating: Detergent foam has been detected — too much or old detergent was used. This is a specific fault code the appliance's control board uses to flag a problem it has detected — it won't clear permanently by switching the power off and on, because the underlying condition that caused it still exists.

What To Check Before Calling a Technician

This is not a hardware fault — using less detergent resolves it. If the E33 / F33 error persists after the checks above, a technician will be able to diagnose and fix it with the right tools — attempting to open the unit's panels or handle electrical components without training is not safe.

Frequently Asked Questions

• E:00 <-> -18 — The drain pump is blocked (obstructed)
• E16 / E34 / F16 / F34 — The door is not locked properly
• E17 / F17 / F29 — The filters in the water connection or AquaStop hose are blocked, or water pressure is too low
• E18 / F18 — The drainage hose is blocked or kinked
• E32 / F32 — An imbalance is detected — the load is unevenly distributed
• E80 — Fault in the drive circuit