Oven
F5
The F5 error code on a Beko oven indicates a fault with the oven’s temperature sensor (NTC sensor), meaning the appliance cannot accurately read or regulate its internal temperature. This fault will prevent the oven from heating correctly and is moderately serious — but in many cases it’s a straightforward fix.
What does this error mean?
Your Beko oven constantly monitors its internal temperature using an NTC (Negative Temperature Coefficient) thermistor — a small probe inside the oven cavity. When the control board detects that this sensor is sending an abnormal reading — either out of the expected range, shorted, or completely open-circuit — it throws the F5 code and shuts down the heating function to prevent overheating or underheating. Essentially, the oven has lost confidence in its ability to control temperature safely.
Est. repair cost
£10–£30 DIY (NTC sensor); £100–£200 professional repair (PCB fault); £250–£350+ for a new replacement oven
🔍 Likely causes
🛠️ Step-by-step fix
Power cycle the oven: Switch the oven off at the wall socket (or trip the circuit breaker), wait 5 full minutes, then restore power. A one-off software glitch can trigger F5 and a hard reset often clears it.
Check the oven door seal: Inspect the rubber or fibreglass seal around the oven door for tears, gaps, or sections that have pulled away. A damaged seal is inexpensive to replace (around £10–£25 for the part) and you can clip or slide a new one in yourself — no tools needed on most Beko models.
Locate and inspect the NTC sensor: With the oven completely unplugged, open the oven door and look for the temperature sensor probe — it’s usually a small metal rod, roughly 3–5cm long, mounted on the back wall or side wall of the oven cavity, secured by one or two screws. Check for visible damage, discolouration, or corrosion.
Test the NTC sensor with a multimeter: Unplug the sensor connector (it pulls off the spade terminals). At room temperature (~20°C), a healthy Beko NTC sensor should read approximately 10,000–12,000 ohms (10–12kΩ). A reading of zero (short) or infinite (open) confirms a failed sensor. Replacement sensors cost £10–£30 and are available from Beko spares stockists — fitting requires only a screwdriver.
Inspect the sensor wiring harness: Trace the wires from the sensor back towards the control board at the rear of the appliance. Look for any visible scorching, pinched wires, or a connector that has partially unplugged. Reseat any loose connectors firmly. Do NOT open the main control board housing — stop here and call a professional if the wiring looks burned.
If the sensor and wiring test fine, stop DIY here: A fault on the control board (PCB) is the next likely cause, and replacing or repairing a PCB requires an engineer. Do not attempt to open or work on the control board yourself.
📞 When to call a professional
If replacing the NTC sensor and checking the wiring does not clear the F5 code, the fault lies with the control board (PCB) — this requires a qualified appliance engineer. Also call a professional immediately if you notice any burnt wiring, a burning smell, or any signs of electrical arcing inside the oven. When booking, tell the engineer: ‘Beko oven showing F5 error code — NTC sensor and wiring already checked, suspected PCB fault.’
⚖️ Repair or replace?
An NTC sensor replacement is a low-cost DIY job (£10–£30 in parts) and well worth doing on any oven. If the fault is the control board, professional repair typically costs £100–£200 including labour — worthwhile on an oven under 7 years old. If your Beko oven is over 8–10 years old and the PCB has failed, replacement ovens start from around £250–£350, making a new appliance the more sensible long-term investment.