Cooker
F03
The F03 error code on a Beko cooker points to a temperature sensor fault in the oven cavity — specifically a problem with the NTC (thermistor) sensor that monitors internal heat. It’s not dangerous in most cases, but your oven will likely shut down or refuse to heat until the fault is cleared.
What does this error mean?
The F03 code tells you the oven’s control board has detected an abnormal reading from the cavity temperature sensor (NTC thermistor). This sensor feeds real-time temperature data to the board so the oven can regulate heat accurately. When the board receives a reading that’s out of expected range — either too high, too low, or no signal at all — it triggers F03 and interrupts operation to prevent overheating or unsafe conditions.
Est. repair cost
£10–£25 DIY sensor replacement; £80–£150 professional repair (sensor + call-out); £150–£250 if control board replacement needed
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Reset the oven: Switch the cooker off at the wall socket (or trip the circuit breaker), wait 5 minutes, then restore power. If F03 clears and does not return, it was likely a transient glitch. Monitor closely.
Step 2 — Check the oven’s cooling fan: Turn the oven on and listen for the fan running. If you can’t hear it or it sounds strained, the fan may be obstructed or failed — this is a job for a qualified repairer.
Step 3 — Inspect visible wiring around the sensor: With the oven fully off and unplugged, remove the back inner panel of the oven cavity (consult your Beko manual for your model). Check for obviously burnt, melted, or disconnected wiring near the sensor. Do not attempt to open the control board housing.
Step 4 — Test or replace the NTC sensor: The NTC sensor is typically a small probe mounted in the oven cavity wall. Replacement sensors for Beko ovens cost £10–£25 online (search your model number on sites like eSpares or 4ourhouse). Fitting involves unplugging the old sensor and clipping in the new one — no specialist tools required on most Beko models.
Step 5 — Clear the error and test: After any repair, restore power and run the oven at 180°C for 20 minutes. If F03 does not return and the oven reaches temperature, the fault is resolved.
Step 6 — If F03 persists after sensor replacement: The fault is likely at the control board level. Stop here and call a professional — do not attempt to repair or replace the control board yourself.
📞 When to call a professional
Call a qualified appliance engineer if the error persists after a reset and after replacing the NTC sensor, as the control board is likely at fault. Also call immediately if you see burnt wiring, smell burning, or the oven trips your consumer unit. When you call, tell the engineer you have a Beko cooker showing an F03 error and that you’ve already attempted a reset and (if applicable) replaced the NTC sensor.
⚖️ Repair or replace?
A professional repair for an F03 fault — typically sensor replacement plus a call-out — will run £80–£150 with a reputable UK appliance engineer. If the control board needs replacing, expect £150–£250 all-in. If your Beko cooker is over 8 years old and facing a board replacement, a new freestanding electric cooker from £300–£450 is likely the more economical choice long-term.