Oven
F11
The F11 error code on an AEG oven indicates a fault with the oven’s temperature sensor (NTC probe) or its circuit — it’s a moderately serious fault that will prevent the oven from heating safely until resolved.
What does this error mean?
F11 tells you the oven’s control board is receiving an out-of-range or missing signal from the temperature sensor (also called an NTC sensor or thermostat probe). Without accurate temperature readings, the oven cannot regulate heat and shuts down as a safety measure. This is a protective fault, not a catastrophic failure — in many cases the sensor itself has simply failed and is a straightforward replacement.
Est. repair cost
£15–£35 DIY sensor replacement; £80–£150 professional repair (sensor or PCB)
🔍 Likely causes
🛠️ Step-by-step fix
Power cycle the oven: switch it off at the wall socket or isolate it at the fuse board for 5 minutes, then restore power. If F11 clears, monitor closely — an intermittent fault may return.
Check the oven is clean around the back wall and base where the sensor probe is mounted. Baked-on grease around the sensor can cause false readings. Clean the area carefully with the oven cold and unplugged.
Locate the NTC sensor — it’s typically a small metal probe mounted through the back wall of the oven cavity, secured with one or two screws. With the oven unplugged and fully cold, inspect the visible wiring connector for obvious burn marks, corrosion, or a loose plug. Reseat the connector firmly.
Test the sensor resistance: unplug the oven, disconnect the sensor connector, and use a multimeter set to Ohms. A healthy AEG NTC sensor typically reads around 990–1010 Ω at room temperature (20°C). A reading of 0 Ω (short) or OL/infinite (open circuit) confirms a failed sensor.
Replace the NTC sensor if it fails the resistance test. Search your AEG oven’s model number (printed inside the door frame) on a UK spares site such as eSpares or 4ourhouse. Sensors typically cost £15–£35. Unscrew the old probe, swap in the new one, reconnect the wiring, and restore power.
If the error persists after a confirmed sensor replacement, stop DIY work — the control board (PCB) is likely at fault and requires professional diagnosis.
📞 When to call a professional
Call a qualified appliance engineer if F11 returns after a new sensor is fitted, if you find burnt or melted wiring inside the oven, or if you are not comfortable using a multimeter and working around electrical components. When you call, tell the engineer: ‘My AEG oven is showing an F11 fault — I believe it’s an NTC temperature sensor or PCB issue.’ This helps them bring the right parts to the first visit.
⚖️ Repair or replace?
A professional repair for an F11 fault typically costs £80–£150 depending on whether it’s a sensor or PCB replacement. If your AEG oven is under 8 years old and was a mid-to-premium model (£500+), repair is usually worth it. If it’s over 10 years old or the PCB needs replacing on a budget model, a new oven is likely the better investment.