Siemens Washer Error F23 — Overflow Fix

What it means

Siemens Error F23 means the overflow or leak detection sensor has triggered.
Drain the machine, check for excess water in the base, and inspect the pump and door seal.

How to Fix It

Do not restart immediately

F23 indicates a potential water overflow or leak.
Do not restart the machine until you have identified and fixed the cause.
Drain the drum

Use the emergency drain hose in the pump filter panel at the front-bottom of the machine to drain any water remaining in the drum.
Check the base for water

Tilt the machine slightly and check underneath for pooled water.
A leak from the drum seal, hose connection, or pump can accumulate in the base and trigger F23.
Inspect the door seal

The rubber door gasket can develop cracks or tears that allow water to drip into the base during a cycle.
Inspect the seal carefully, especially at the bottom.
Check the detergent drawer

Excessive detergent or fabric softener causes over-sudsing, which can overflow into the base.
Use only the recommended amount of low-suds detergent.
Inspect inlet and drain hose connections

Check all hose connections at the back of the machine for drips or weeping at the joints.
Retighten or replace hose clamps if necessary.

Frequently Asked Questions

What does Siemens Error F23 mean?

F23 is triggered by the anti-flooding sensor in the base of the machine.
It activates when water accumulates in the machine base due to an overflow or internal leak.

Can too much detergent cause Siemens F23?

Yes — excess detergent creates heavy sudsing.
If foam rises above the drum and spills into the base, the anti-flood sensor triggers F23.
Use the correct amount of HE (low-suds) detergent.

How do I reset Siemens Error F23?

Once you have identified and fixed the cause, tilt the machine to drain any water from the base.
Allow the base to dry completely, then perform a power reset before restarting.