Oven
F01
The F01 error code on a Hotpoint oven points to a fault with the oven’s temperature sensor (also called the NTC probe), meaning the appliance can’t accurately read the internal temperature and has shut itself down as a safety precaution. It’s one of the more common faults on Hotpoint single and double electric ovens, and while it sounds alarming, it’s often a straightforward repair. In this guide, you’ll learn exactly what’s causing your F01 code, which steps you can safely try yourself, and when it’s time to call in a professional.
What does this error mean?
The F01 fault code on a Hotpoint electric oven indicates that the control board has detected an open circuit or an out-of-range signal from the oven temperature sensor — known as the NTC (Negative Temperature Coefficient) thermistor or sensor probe. In plain English, the oven’s ‘thermometer’ is either not sending a signal at all, sending a reading that makes no sense, or has physically failed. Because the oven can’t confirm it’s heating safely, it locks out to protect you and your kitchen. This fault is specific to the thermal sensing circuit and does not typically indicate a problem with the heating elements themselves, though related wiring faults can sometimes trigger it simultaneously.
Est. repair cost
£15–£35 for a DIY NTC sensor replacement; £80–£150 for a professional repair (sensor fault); £150–£250 if the control board needs replacing
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Power cycle the oven: Switch the oven off at the wall socket or turn off the circuit breaker in your fuse box. Leave it completely without power for at least 5 minutes, then switch back on. A one-off software glitch can occasionally trigger F01; a full power reset clears the fault memory. If the error doesn’t return, monitor the oven over the next few uses.
Step 2 — Check the oven is not overheating from a blocked cavity: Make sure there is no baking tray, foil, or debris blocking airflow inside the oven cavity. Restricted airflow can cause localised heat spikes that stress the sensor. Remove everything from inside the oven and try again.
Step 3 — Inspect the temperature sensor probe inside the oven cavity: Open the oven door and look for the temperature sensor — it’s usually a thin metal rod or probe, roughly 3–5 cm long, mounted to the back wall of the oven cavity (sometimes the side wall on fan oven models). Check it visually for obvious damage: cracks, discolouration, or burning. No tools are needed for this visual check.
Step 4 — Check the sensor probe is seated correctly: The probe is typically held in place by one or two small Phillips-head screws. With the oven cold and unplugged from the mains, use a screwdriver to gently confirm the probe is firmly mounted and hasn’t worked loose. Do NOT attempt this step with the oven powered.
Step 5 — Inspect the visible sensor wiring for damage: Still with the oven unplugged, look at the wires leading away from the sensor probe toward the back of the oven. Look for any obvious melting, fraying, or kinking. If you can see clearly damaged wiring, this confirms the fault source — but do not attempt to repair live electrical wiring yourself.
Step 6 — Test the sensor resistance with a multimeter (confident DIYers only): If you own a multimeter, you can test whether the NTC sensor is within spec. Disconnect the two sensor wires (note which terminal each came from), set your multimeter to resistance (Ω), and touch the probes to the sensor terminals. At room temperature (around 20°C), a healthy Hotpoint NTC sensor should read approximately 990–1,100 ohms. A reading of zero, infinite resistance, or wildly outside this range confirms the sensor has failed and needs replacing.
Step 7 — Replace the temperature sensor probe (DIY-appropriate repair): Replacement NTC sensors for Hotpoint ovens are widely available from UK appliance parts suppliers such as eSpares, 4YourHome, and Hotpoint’s own parts service. Prices typically range from £15 to £35. Make sure you have the full model number (found on the frame inside the oven door) before ordering. With the oven unplugged, unscrew the old probe, disconnect the wires, connect the new sensor, reseat the wires carefully away from heating elements, and refit the probe. Restore power and test.
Step 8 — If the error persists after sensor replacement, stop DIY: If you’ve replaced the sensor and the F01 error still appears, the fault likely lies in the wiring harness between the sensor and the control board, or in the control board (PCB) itself. Both of these require the outer casing to be removed and internal electrical components to be accessed — this is not a safe DIY task and must be handled by a qualified appliance engineer.
📞 When to call a professional
You should call a qualified appliance repair engineer if: the F01 error returns immediately after a power reset; you’ve replaced the NTC sensor and the fault persists; your visual inspection reveals burnt or melted wiring; or you’re not comfortable using a multimeter or removing parts from the oven. When you call, tell the engineer: the exact error code (F01), your oven’s full model number (e.g. SI4 854 PIX or similar — found on the label inside the door frame), whether the error appeared suddenly or came on gradually, and what steps you’ve already tried. This will save diagnostic time and potentially money. Look for engineers who are members of the Domestic Appliance Service Association (DASA) or who carry NICEIC or City & Guilds electrical qualifications. Always check reviews and confirm they work on Hotpoint appliances before booking.
⚖️ Repair or replace?
If your Hotpoint oven is under 7 years old and the fault is a failed NTC sensor, repair is almost always the right call. A DIY sensor replacement costs £15–£35 for the part and takes under an hour — excellent value. A professional repair (sensor replacement plus call-out) will typically cost £80–£140 and is still well worth it on a relatively young appliance. If the control board (PCB) has failed, professional repair costs rise to £150–£250 depending on the model, as the PCB itself costs £60–£120. At that price point, weigh it against the age of the oven: if it’s under 5 years old, repair; if it’s 8–10 years old, a new Hotpoint or equivalent mid-range electric oven can be purchased for £300–£500, making replacement more sensible. Parts availability for Hotpoint is generally good in the UK — Hotpoint is owned by Whirlpool and spares are widely stocked — so don’t assume you can’t get parts before checking.