Oven
F8
The F8 error code on a Miele oven indicates a fault with the door lock mechanism or door lock switch — it’s a moderately serious fault that will prevent the oven from operating safely until resolved.
What does this error mean?
Miele ovens use an electronic door locking system, particularly on models with a pyrolytic (self-cleaning) function. The F8 code means the oven’s control board is detecting that the door lock is not engaging, releasing, or reporting its position correctly. Until the oven can confirm the door is properly secured, it will refuse to run a cycle to prevent heat escaping or injury.
Est. repair cost
£80–£180 for a professional repair; £25–£60 for a DIY door lock assembly part
🔍 Likely causes
🛠️ Step-by-step fix
Power cycle the oven: switch it off at the wall, wait 5 minutes, then switch back on. This clears temporary software glitches and costs nothing — try this first.
Inspect the door lock slot (usually top-centre of the oven door frame): use a torch to check for visible carbon build-up or debris blocking the locking arm. If present, clean carefully with a dry cloth or soft brush — never use water near this area.
Check the door alignment: open and close the door slowly and feel for any stiffness, grinding, or uneven resistance. If the door drops or doesn’t sit flush when closed, the hinges may need adjustment or replacement.
Check the door lock wiring connector: if you’re comfortable doing so, remove the oven from its housing (after isolating the power at the fuse board) and inspect the wiring connector at the back of the door lock assembly for loose or burnt terminals. Reseat any loose connections.
If the lock mechanism is visibly broken, cracked, or the motor makes no sound when a pyrolytic cycle is started, order a replacement Miele door lock assembly (use your model number — found inside the door frame). Miele part numbers vary by model; expect to pay £25–£60 for the part. Replacement requires removing the inner door panel — straightforward but fiddly.
If the error persists after all the above steps, do not attempt to bypass the lock or force the oven to operate — stop and call a professional.
📞 When to call a professional
Call a Miele-approved engineer or qualified appliance technician if the error returns after a power cycle, if the wiring shows signs of burning, or if you are not comfortable accessing internal components. When calling, tell them: ‘My Miele oven is showing error code F8 — I believe it’s a door lock fault.’ This helps them bring the right parts and reduces call-out time.
⚖️ Repair or replace?
A professional repair for an F8 fault typically costs £80–£180 depending on whether it’s the lock assembly, wiring, or PCB. If your Miele oven is under 8 years old, repair is almost always worthwhile — Miele appliances are built to last 20 years and replacement costs £800–£2,500+. If the oven is over 12 years old and the PCB is at fault, replacing the appliance becomes more cost-effective.