Oven
F13
The F13 error code on an AEG oven signals 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?
F13 means your AEG oven’s control board has detected an abnormal reading from the NTC temperature sensor — the component that tells the oven how hot it actually is inside the cavity. Without a reliable temperature reading, the oven cannot regulate heat accurately, so it locks out as a safety measure. This fault applies to both single and double AEG electric ovens and is distinct from a door lock or control panel error.
Est. repair cost
£15–£35 DIY (NTC sensor part only) or £80–£250 professional repair depending on whether it’s the sensor or control board
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 – Reset the oven: Switch the oven off at the wall socket (or trip the circuit breaker), wait 5 minutes, then restore power. If F13 clears and doesn’t return, the fault was a temporary glitch. Monitor for recurrence.
Step 2 – Locate the NTC sensor: With the oven completely cold and unplugged, open the oven door and look for a small metal probe mounted on the rear or side wall of the oven cavity — it’s usually held by one or two screws.
Step 3 – Check the sensor visually: Look for obvious signs of damage — burnt insulation, cracked ceramic tip, or corrosion on the connector. If visibly damaged, the sensor needs replacing.
Step 4 – Test the sensor resistance: Using a basic multimeter set to Ohms (Ω), disconnect the sensor connector and measure resistance across the two sensor terminals. 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.
Step 5 – Replace the NTC sensor: Order a genuine AEG replacement sensor using your oven’s model number (found inside the door frame). Unscrew the old sensor, pull it out carefully, disconnect the wiring connector, and fit the new sensor in reverse order. Genuine AEG NTC sensors cost £15–£35 from UK appliance parts suppliers such as eSpares or 4ourhouse.
Step 6 – Inspect the wiring: Before reassembling, trace the sensor cable back towards the control board and check for any pinched, burnt, or chafed sections. Secure any loose connectors firmly. Do NOT open the control board housing — if the wiring looks intact but the fault persists after a new sensor, stop here and call an engineer.
📞 When to call a professional
If fitting a new NTC sensor doesn’t clear the F13 code, the fault likely lies in the wiring harness or the main control board (PCB) — both require professional diagnosis. Call an appliance repair engineer and tell them: ‘My AEG oven is showing error code F13, I’ve already replaced the NTC temperature sensor and the fault persists.’ This will save diagnostic time and cost.
⚖️ Repair or replace?
A professional repair for an F13 fault (sensor replacement by an engineer) typically costs £80–£130 including parts and labour in the UK. If the control board needs replacing, expect £150–£250+. For ovens over 8–10 years old, weigh repair costs against a new mid-range AEG oven at £400–£700 — if the repair exceeds 50% of replacement cost, replacing is usually the smarter move.