Cooker
F01
The F01 error code on a Smeg cooker indicates a fault with the oven’s temperature sensor (NTC probe), meaning your appliance cannot accurately read or regulate the internal oven temperature. While it sounds alarming, in many cases this is a fixable issue — and in some instances a simple reset is all it takes. In this guide, you’ll learn exactly what F01 means on a Smeg cooker, the most likely causes, what you can safely do yourself, and when it’s time to call in a professional.
What does this error mean?
The F01 error code on a Smeg cooker (including models in the A-series, Victoria, and Portofino ranges) is triggered when the oven’s electronic control board detects a problem with the NTC temperature sensor — also known as the oven probe or thermostat sensor. This small component sits inside the oven cavity and continuously sends temperature readings back to the control board, allowing the oven to maintain the correct heat. When the control board receives a reading that is out of range — either because the sensor has failed, its wiring has been damaged, or there’s a loose connection — it throws the F01 fault code and typically disables the oven to prevent overheating or underheating your food. In short: your Smeg cooker has lost confidence in its ability to control the oven temperature safely, so it has shut itself down. This is a safety-first measure, not a catastrophic failure.
Est. repair cost
£15–£35 for a DIY NTC sensor replacement; £80–£150 for a professional sensor repair including callout and labour; £180–£300+ if the control board (PCB) needs replacing professionally
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Turn the cooker off and perform a hard reset: Switch the cooker off at the wall socket (or at the fuse spur/consumer unit if there is no accessible plug), leave it completely unpowered for at least 5–10 minutes, then switch it back on. This allows the control board to reboot fully. If the F01 code was caused by a temporary power glitch, this alone may clear it. No tools required.
Step 2 — Check your Smeg model’s manual for a manual reset procedure: Some Smeg cooker models have a specific reset sequence (for example, holding down a button combination on the control panel). Locate your model number (usually on a sticker inside the oven door frame or on the back of the appliance) and download the user manual from Smeg’s UK website (smeguk.com) if you don’t have it to hand. Follow any reset instructions specific to your model.
Step 3 — Inspect and clean the NTC temperature sensor probe: With the oven completely cooled down and the power disconnected at the wall, open the oven door and look for the NTC sensor probe. On most Smeg ovens it is a small metal pin or rod, roughly 3–5 cm long, mounted on the back wall or side wall of the oven cavity, held in place by one or two screws. Using a soft cloth or fine wire brush, gently clean any carbonised grease or residue from the tip of the probe. Repower the oven and check if the F01 code has cleared.
Step 4 — Check the sensor probe is physically secure: With the power disconnected, gently try to wiggle the sensor probe. If it feels loose in its mounting bracket, tighten the retaining screw(s) using a Torx or Philips screwdriver (check which type your model uses — most Smeg ovens use Torx T20). A loose probe can cause intermittent contact and trigger F01. Repower and test.
Step 5 — Test the NTC sensor resistance with a multimeter (confident DIYers only): If you own a multimeter and are comfortable using it, you can test whether the NTC sensor has failed. Disconnect the power, carefully unscrew the sensor probe from the oven wall, and unplug its wiring connector. Set your multimeter to measure resistance (Ohms/Ω). At room temperature (approximately 20°C), a healthy Smeg NTC oven sensor should read approximately 900–1,100 Ω. A reading of zero (short circuit) or infinite resistance (open circuit) confirms the sensor has failed and needs replacing. Note: you are not opening any live electrical components in this step — the sensor connector is accessible from inside the oven cavity.
Step 6 — Replace the NTC temperature sensor if it has failed: Smeg NTC oven sensors are a widely available spare part in the UK. Search for your specific Smeg model number followed by ‘NTC sensor’ or ‘oven temperature probe’ on sites such as 4WheeledDriving.co.uk, eSpares, or ApplianceSpareparts.co.uk. Genuine Smeg parts typically cost £15–£35. With the power disconnected, unscrew the old sensor (usually 1–2 screws), unplug the wiring connector, plug in the new sensor, refit the screws, restore power, and check whether the F01 code has cleared.
Step 7 — Inspect the sensor wiring for visible damage: If replacing the sensor doesn’t resolve F01, with the power disconnected, carefully trace the wiring from the sensor probe towards the back of the oven. Look for any sections of wire that appear discoloured, melted, or frayed. Minor loose connections at the plug-in connector can sometimes be carefully reseated. However, if you find burned or damaged wiring inside the appliance body, stop here and call a qualified appliance engineer — do not attempt to repair internal wiring yourself.
Step 8 — Do not attempt to access or replace the control board (PCB) yourself: If all the above steps have failed to clear F01, the fault likely lies with the main control board. Replacing a PCB on a Smeg cooker involves dismantling the appliance and working near live electrical components. This is not a safe DIY task for a homeowner without appliance repair training. At this point, call a professional engineer and tell them you’ve already replaced the NTC sensor and checked the wiring.
📞 When to call a professional
You should call a qualified appliance engineer (not a gas engineer, unless your Smeg is a dual-fuel model with a gas hob) in the following situations: the F01 error persists after a hard reset and cleaning the sensor probe; the sensor tests faulty on a multimeter and you’re not comfortable replacing it yourself; you’ve installed a new NTC sensor but the error code is still present (suggesting a wiring or PCB fault); or you’ve spotted damaged, burned, or frayed wiring inside the appliance. When you call, tell the engineer: ‘My Smeg cooker is showing an F01 error code, which I understand relates to the NTC temperature sensor. I’ve already tried a hard reset and [list what else you’ve attempted], but the fault is still present.’ This saves diagnostic time and money. If your Smeg cooker is a dual-fuel model (gas hob, electric oven), and the F01 fault is accompanied by any issue with the gas hob, always contact a Gas Safe registered engineer (you can find one at gassaferegister.co.uk). Do not attempt any work on gas components yourself.
⚖️ Repair or replace?
For most Smeg cookers showing F01, repair is the right first move — provided the appliance is under 10 years old and otherwise in good condition. Smeg is a premium Italian brand with good parts availability in the UK, and NTC sensors are inexpensive and straightforward to replace. If the fault turns out to be a failed control board (PCB), costs rise significantly: a PCB for a Smeg cooker typically costs £80–£180 for the part alone, plus £60–£100 labour, bringing the total to £140–£280. At that level, weigh the repair cost against the age of the appliance. A Smeg cooker purchased new in the UK costs anywhere from £600 for an entry-level model to over £3,000 for a Portofino range cooker. As a general rule: if the cooker is under 8 years old and the repair quote is less than 40% of the replacement cost, repair. If it’s over 12 years old or the repair quote is high relative to its current value, it may be more economical to replace. Always ask the engineer for a written quote before authorising PCB replacement work.