Oven
F22
The F22 error code on an AEG oven signals a fault with the oven temperature sensor (NTC probe) — the component that tells your oven how hot it actually is. It’s a common fault but one that will stop your oven heating correctly until it’s resolved.
What does this error mean?
F22 means the oven’s control board has detected that the temperature sensor (also called an NTC sensor or thermostat probe) is reading outside its expected range — either an open circuit or a short circuit. In plain terms, the oven can’t accurately measure its own temperature, so it shuts down the heating function as a safety precaution. You may notice the oven refusing to heat, cutting out mid-cook, or displaying the error immediately on start-up.
Est. repair cost
£10–£30 DIY sensor replacement; £80–£140 professional repair (sensor + labour); £150–£300+ if control board replacement is needed
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Hard reset: Switch the oven off at the wall or isolate it at the fuse board for 5 minutes, then restore power. If F22 clears and doesn’t return, it may have been a temporary glitch; monitor for recurrence.
Step 2 — Check for visible wiring damage: With the oven fully isolated at the fuse board, open the oven door and inspect around the back interior wall where the sensor probe sits. Look for any obviously burnt, melted, or disconnected wiring. Do not probe or open any electrical panels yourself.
Step 3 — Locate and visually inspect the NTC sensor: The sensor is usually a small metal probe mounted on the back or side wall inside the oven cavity, secured by one or two screws. With power OFF, unscrew it carefully. Check for physical damage, corrosion, or a broken probe tip.
Step 4 — Test the sensor resistance (if you own a multimeter): Disconnect the sensor connector and set your multimeter to resistance (Ohms). At room temperature (~20°C), a healthy AEG NTC sensor typically reads approximately 990–1010 Ohms. A reading of zero or infinity (OL) confirms a failed sensor.
Step 5 — Replace the NTC sensor: Order a genuine AEG NTC temperature sensor for your exact model number (found on the sticker inside the oven door frame). Fit the new sensor, reconnect the wiring, restore power, and test. This is a safe DIY task if you are comfortable with basic appliance repair.
Step 6 — If F22 persists after a confirmed sensor replacement: The fault lies with the wiring harness or the control board. Do not attempt to repair or replace the control board yourself — contact an appliance engineer at this point.
📞 When to call a professional
Call a qualified appliance repair engineer if the F22 error returns after a sensor replacement, if you find burnt or damaged wiring inside the oven, or if you’re not confident working with the appliance isolated at the fuse board. When you call, tell the engineer: ‘My AEG oven is showing an F22 error code — I believe it’s the NTC temperature sensor or associated wiring.’ This helps them arrive with the right parts and cuts diagnosis time.
⚖️ Repair or replace?
A professional repair for an F22 fault — typically sensor replacement plus labour — costs around £80–£140 in the UK. If your AEG oven is under 8 years old and was a mid-to-high-spec model (£500+), repair is almost always the better value. If the oven is over 10 years old, is a budget model, or the engineer identifies a failed control board (which can add £150–£250 to the bill), replacement is worth considering.