Oven
F3
The F3 error code on a Beko oven indicates a fault with the oven temperature sensor (NTC probe), meaning the appliance cannot accurately read or regulate its internal temperature. It will typically prevent the oven from heating as a safety measure — but in most cases, it’s a straightforward fix.
What does this error mean?
The F3 code tells you the oven’s control board has detected an abnormal signal from the temperature sensor, also called the NTC (Negative Temperature Coefficient) probe. This sensor sits inside the oven cavity and constantly feeds temperature data to the main board. When the signal falls outside expected parameters — either too high, too low, or absent entirely — the board throws F3 and locks out heating to prevent overheating or damage.
Est. repair cost
£10–£25 DIY sensor replacement; £80–£150 professional repair (sensor or wiring); £120–£200+ if main control board replacement is needed
🔍 Likely causes
🛠️ Step-by-step fix
1. Power cycle the oven: switch it off at the wall socket (or trip the circuit breaker), wait 5 minutes, then power back on. A transient fault can trigger F3, and a hard reset clears it.
2. Check the oven cavity for obvious damage: open the oven door and look for a small metal probe — usually located at the back wall or top of the cavity. Inspect it visually for burns, cracks, or physical damage.
3. Check the sensor connector: if you are comfortable doing so, carefully pull the oven away from its housing, remove the back panel (unplug first — always), and locate the NTC sensor wiring connector. Firmly re-seat any loose connectors you find.
4. Test the NTC sensor resistance: using a basic multimeter set to resistance (Ω), disconnect the sensor and measure across its two terminals. A healthy Beko NTC sensor typically reads around 1,000Ω (1kΩ) at room temperature (~20°C). A reading of zero, infinite, or wildly out of range confirms a faulty sensor.
5. Replace the NTC sensor: Beko NTC probes are widely available from UK spares suppliers (eSpares, 4ourhouse, BuySpares) for £10–£25. Note your exact oven model number (found on the frame inside the door) to order the correct part. Fitting is usually two screws and a connector — well within DIY capability.
6. If the sensor tests fine and the error persists after replacement, the main control board is likely at fault. At this point, stop DIY and call a qualified appliance engineer — board diagnosis and replacement requires specialist tools and knowledge.
📞 When to call a professional
Call a qualified appliance repair engineer if the F3 error returns after you have replaced a confirmed faulty NTC sensor, or if you are not confident working with the oven’s internal wiring. When you call, tell them: ‘My Beko oven is showing an F3 error code, I believe it’s the NTC temperature sensor or potentially the main control board.’ This saves diagnostic time and money.
⚖️ Repair or replace?
A professional repair for an F3 fault typically costs £80–£150 all-in (call-out plus labour plus part), depending on your region and whether the board needs replacing. If your Beko oven is under 7 years old, repair is almost always worth it — Beko ovens retail from around £250–£500 new. If it’s over 8–10 years old and the control board has failed (£60–£120 for the part alone), replacement starts to make more financial sense.