Oven
F32
The F32 error code on an AEG oven indicates a fault with the oven’s temperature sensor (NTC sensor) or its associated wiring circuit. It’s a moderately serious fault — your oven may refuse to heat or shut off mid-cook until it’s resolved.
What does this error mean?
F32 signals that the oven’s control board is receiving an out-of-range or absent reading from the NTC temperature sensor, the component that monitors internal oven temperature. Without a reliable temperature signal, the oven’s safety system intervenes and halts operation to prevent overheating or underheating. This is an electrical fault, not a gas issue, so careful DIY investigation is appropriate before calling an engineer.
Est. repair cost
£15–£35 DIY sensor replacement; £80–£150 professional repair (sensor); £150–£250+ if PCB replacement is needed
🔍 Likely causes
🛠️ Step-by-step fix
Power cycle the oven: switch it off at the wall socket or isolate at the fuse board, wait 5 minutes, then power back on. This clears temporary electronic glitches and takes under a minute to try.
Check for obvious contamination: if the oven interior is heavily soiled, run a manual clean cycle or wipe down around the sensor probe (the small metal rod, usually at the back or top of the oven cavity) — grease build-up can skew readings.
Locate and inspect the NTC sensor: with the oven fully isolated from power, find the sensor probe inside the cavity. Check the connector where the sensor cable meets the oven body for any loose, burnt, or corroded pins — reseat it firmly if it feels loose.
Test the NTC sensor resistance: if you own a multimeter, disconnect the sensor and measure its resistance at room temperature (around 20°C). An AEG NTC sensor typically reads approximately 10,000–12,000 ohms at room temperature. A reading of 0 (short circuit) or OL (open circuit) confirms a failed sensor.
Replace the NTC sensor if faulty: AEG NTC sensors are available from UK appliance parts suppliers (e.g. 4ourhouse, eSpares, BuySpares) for £15–£35. Ensure you match the part number to your specific model. Fitting involves two screws and one connector — straightforward for a confident DIYer with the oven fully isolated.
If the new sensor does not clear the fault, stop DIY work — the control board (PCB) is the likely next cause and requires professional diagnosis to avoid an expensive unnecessary replacement.
📞 When to call a professional
Call a qualified appliance repair engineer if replacing the NTC sensor does not resolve the F32 code, if you find burnt or melted wiring inside the oven cavity, or if you’re not comfortable working with electrical components. When booking, tell the engineer: ‘My AEG oven is showing an F32 fault code — I believe it’s an NTC temperature sensor or PCB issue.’ This saves diagnostic time and may reduce your call-out cost.
⚖️ Repair or replace?
A professional repair for F32 — covering call-out, diagnosis, and a sensor replacement — typically costs £80–£150 in the UK. If the PCB is at fault, expect £150–£250 or more. For ovens under 8 years old, repair is almost always worthwhile. For ovens over 10 years old where the repair cost exceeds 50% of a new equivalent (mid-range AEG built-in ovens start around £350–£500), replacement is the more sensible long-term investment.