What F103 Means
F103 means the washer's internal leak sensor has detected water where it shouldn't be, and the machine has halted the cycle and activated the drain pump as a precaution.
Common Causes of F103
- A failed hose connection or supply line leak
- A cracked or failing tub seal
- A stuck or failed leak sensor giving a false trigger
🔧 One Safe Check You Can Try
Check the floor around and underneath the machine for visible water before doing anything else, and don't run another cycle until you've confirmed there's no active leak.
⚠ Why You Shouldn't Go Further Than That
- An active internal leak is a real water-damage risk to your home, and running the machine again before confirming the source risks making it worse.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.
Technical Reference
- Code
- F103
- Appliance
- Miele washer
- Maker documentation
- Miele owner manuals and use & care guides
- Checked
- September 2026
Code meanings can change between control generations. Before acting on a code, match the full model number on your appliance's rating label against the manual for that model. We are an independent repair service, not affiliated with Miele & Cie. KG.