Oven
F4
The F4 error code on a Beko oven indicates a fault with the oven temperature sensor (NTC probe) or its circuit — it’s one of the more common Beko oven faults and, in many cases, is straightforward to resolve without a professional callout.
What does this error mean?
Your Beko oven continuously monitors internal temperature using a sensor called an NTC (Negative Temperature Coefficient) probe. When the oven displays F4, it means the control board is receiving a signal from that sensor that is either out of the expected range or missing entirely — typically indicating an open circuit or a resistance reading that doesn’t match any valid temperature. The oven will usually cut out or refuse to heat as a safety precaution.
Est. repair cost
£15–£35 DIY sensor replacement; £80–£180 professional repair (sensor or PCB); £100–£150 for PCB part alone
🔍 Likely causes
🛠️ Step-by-step fix
Power cycle the oven: switch it off at the wall socket (or trip the circuit breaker), wait 5 full minutes, then restore power. A temporary sensor glitch or moisture issue will sometimes clear on its own.
Check the oven cavity for obvious damage: with the oven cold and unplugged, use a torch to inspect the rear inner wall for the NTC sensor — a small metal probe, usually secured with one screw. Look for visible burning, corrosion, or a disconnected wire at the probe tip.
Inspect and reseat the sensor connector: carefully pull the oven away from the wall and remove the back panel (usually 4–6 screws). Locate the thin two-wire connector linking the NTC probe to the wiring loom and firmly press it back together. Corroded or loose connectors are a common cause of F4.
Test the NTC sensor with a multimeter (if you’re comfortable): unplug the sensor connector and measure resistance across the two sensor wires. At room temperature (~20°C), a healthy Beko NTC probe typically reads around 10,000–12,000 ohms. A reading of zero, infinity, or wildly outside this range confirms the sensor has failed.
Replace the NTC temperature sensor: genuine or compatible Beko oven NTC probes are widely available online (search your oven’s model number, found inside the door frame). The part costs £15–£35 and replacement is straightforward — one screw and one connector. Ensure the oven is unplugged throughout.
If the new sensor does not clear the F4 code, the control board (PCB) is likely at fault — at this point, stop DIY work and call a qualified appliance engineer, as PCB diagnosis and replacement requires professional tools and expertise.
📞 When to call a professional
Call a qualified appliance repair engineer if replacing the NTC sensor does not resolve the F4 error, as the control board (PCB) will need professional diagnosis. Also call immediately if you notice any burning smell, scorched wiring, or signs of heat damage inside the oven cavity — do not attempt to repair damaged electrical wiring yourself. When you call, tell the engineer you have a Beko oven displaying an F4 error code and that you’ve already replaced the NTC sensor (if applicable).
⚖️ Repair or replace?
A professional repair for an F4 fault — covering the callout, sensor replacement, or PCB work — typically costs £80–£180 in the UK depending on your region and whether a PCB is needed. If your Beko oven is under 7 years old and the fix is sensor-only, repair is almost always the better value. If the oven is over 10 years old and requires a new PCB (£100–£150 in parts alone), replacement with a comparable new oven in the £300–£450 range is likely the more economical long-term choice.