Cooker
F10
The F10 error code on a Smeg cooker signals a fault with the oven temperature sensor (NTC probe), meaning the appliance cannot accurately read or regulate heat. It’s a moderately serious fault — the oven will typically stop working until the issue is resolved.
What does this error mean?
F10 indicates that the oven’s NTC (Negative Temperature Coefficient) temperature sensor has sent a reading outside of the expected range — either an open circuit (no signal) or a short circuit (constant signal). The control board interprets this as a dangerous or unreliable temperature condition and shuts the oven down as a precaution. This is a protective measure, not a catastrophic failure, and is often a straightforward repair.
Est. repair cost
£15–£35 DIY sensor replacement; £80–£140 professional sensor repair; £150–£300+ if PCB replacement is needed
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 – Power cycle the oven: Switch the cooker off at the wall socket (or trip the circuit breaker), wait 5 minutes, then restore power. If F10 clears and the oven heats correctly, it was a temporary sensor glitch. Monitor over the next few uses.
Step 2 – Check for obvious wiring damage: With the oven completely unplugged, open the oven door and look inside at the rear wall for the temperature probe — a small metal pin or rod. Inspect the visible part of its cable for any obvious burning, melting, or disconnection. Do not touch internal electrical components.
Step 3 – Reseat accessible connectors: On some Smeg models, the sensor connector is accessible behind the back panel of the oven cavity after removing 2–4 screws. If you are confident doing this with the appliance fully unplugged, disconnect and firmly reseat the sensor connector. Do not attempt this if you’re unsure — call a professional instead.
Step 4 – Test or replace the NTC sensor: If you have a multimeter, test the sensor’s resistance at room temperature — a healthy Smeg NTC probe typically reads around 10,000 ohms (10kΩ) at 25°C. A reading of zero (short) or infinite (open circuit) confirms a failed sensor. Replacement Smeg NTC probes cost £15–£35 online and are a practical DIY repair for a confident homeowner.
Step 5 – If the sensor tests fine, stop DIY here: A working sensor paired with a persistent F10 code points to a wiring harness fault or a failed PCB — both require a qualified appliance engineer to diagnose and repair safely.
📞 When to call a professional
Call a qualified appliance engineer if the error returns after a power cycle, if you find burned or melted wiring, or if a new sensor fails to clear the code — as this points to a PCB fault. When booking, tell the engineer: ‘My Smeg oven is showing an F10 error code, which I understand relates to the NTC temperature sensor or its circuit.’ This saves diagnostic time and may reduce your call-out cost.
⚖️ Repair or replace?
An NTC sensor replacement by a UK appliance engineer typically costs £80–£140 including parts and labour. A PCB replacement is significantly more expensive at £150–£300+, which on an oven over 8–10 years old may not represent good value. If your Smeg cooker is under 7 years old and the fault is sensor-related, repair is almost always the right call; beyond 10 years with a PCB fault, compare repair cost against a new mid-range Smeg or equivalent before committing.