Oven
F1
The F1 error code on a Candy oven points to a fault with the oven’s temperature sensor (NTC probe) — the component responsible for monitoring and regulating heat inside the cavity. It’s one of the more common faults on Candy electric ovens, and while it sounds alarming, it’s not always an expensive fix. In this guide, you’ll learn exactly what the F1 code means, why it triggers, what you can safely try yourself, and when it’s time to call in a professional appliance engineer.
What does this error mean?
The F1 error code on Candy ovens (including models under the Hoover-Candy group, such as Candy, Rosières, and some Hoover-branded ovens that share the same control board architecture) signals that the oven’s main temperature sensor — known as an NTC (Negative Temperature Coefficient) thermistor or probe — has either failed, is reading an out-of-range temperature, or has lost its connection to the electronic control board. In plain terms: the oven’s ‘brain’ is trying to check the temperature inside the cavity, but the sensor is either sending back a nonsensical reading, no reading at all, or a reading that suggests the oven is dangerously overheated. As a safety measure, the oven shuts down and displays F1 to prevent damage or a hazard. You may notice the oven refuses to heat, cuts out mid-cook, or displays the error as soon as you try to start it.
Est. repair cost
£10–£30 for a DIY NTC sensor replacement; £80–£150 for a professional repair (sensor/wiring fault); £150–£300 if the control board (PCB) needs replacing
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Perform a full power reset (tools needed: none). Switch the oven off at the wall socket or turn off the circuit breaker for the oven circuit. Leave it completely unpowered for at least 5 minutes, then restore power and test the oven. This clears temporary software glitches and costs nothing. If F1 disappears and does not return, monitor the oven over the next few uses.
Step 2 — Check the oven’s clock and control panel settings (tools needed: none). On many Candy electric ovens, the oven will not operate and may display errors if the clock has not been set after a power cut. Consult your model’s manual (available free on the Candy UK website using your model number) to confirm the clock is set correctly and no child lock or demo mode is active.
Step 3 — Inspect the oven cavity and clean any heavy grease build-up (tools needed: oven cleaner, damp cloth). Excessive grease on the cavity walls or near the temperature sensor can cause heat-related irregularities. With the oven cold and unplugged, clean the interior thoroughly, paying particular attention to the back wall where the NTC probe is usually located on Candy models.
Step 4 — Locate and visually inspect the NTC temperature sensor (tools needed: torch, no other tools needed for visual check). The NTC probe on most Candy single and double electric ovens is a small bullet-shaped or rod-shaped sensor mounted on the back inner wall of the oven cavity, secured by one or two screws, with a wire harness running behind the oven panelling. With the oven cold and unplugged, shine a torch on it and look for obvious physical damage: a cracked probe body, burnt insulation on the wires, or a disconnected connector plug.
Step 5 — Check and reseat the NTC probe connector (tools needed: none, or a small flathead screwdriver to ease the clip). If you can see the connector where the sensor wire meets the harness (sometimes accessible by removing the oven’s back panel — see Step 6), gently unplug and firmly reseat it. Corroded pins can sometimes be carefully cleaned with a dry cotton bud. IMPORTANT: Only do this with the oven completely unplugged from the mains.
Step 6 — Remove the oven’s back panel to access wiring (tools needed: Torx T20 or Phillips screwdriver — check your model). SAFETY FIRST: Ensure the oven is fully unplugged before removing any panels. On most Candy built-in ovens, the rear inner panel is held by 2–4 screws. Once removed, you can trace the NTC probe wires back towards the control board and check for obvious breaks, chafing, or burnt connectors. Do not touch any other components on the control board. If you are uncomfortable doing this, stop here and call a professional.
Step 7 — Test the NTC sensor with a multimeter (tools needed: digital multimeter, set to resistance/Ω). With the oven unplugged and the sensor connector unplugged from the harness, place the multimeter probes on the two sensor terminals. At room temperature (around 20°C), a healthy Candy NTC probe should read approximately 10,000 ohms (10kΩ). A reading of zero (short circuit) or ‘OL’/’infinite’ (open circuit) confirms the sensor has failed and needs replacing.
Step 8 — Replace the NTC temperature sensor (tools needed: correct replacement NTC probe for your Candy model, screwdriver). Genuine and compatible NTC probes for Candy ovens are widely available from UK appliance parts suppliers such as eSpares, Spare It, or 4YourHome, typically for £10–£30. Search using your full model number (found on the sticker inside the oven door frame). Unscrew the old probe, disconnect the wiring, connect the new probe, refit the screws, and reassemble. Restore power and test.
Step 9 — Inspect the cooling fan (tools needed: torch). With the oven running (if it allows), listen for the cooling fan — usually audible as a gentle hum from the top or rear of the appliance. If the fan is silent or rattling, it may have failed and caused an overheating-triggered F1. Fan replacement is a moderate DIY task on Candy ovens but requires removing the oven from its housing and accessing the rear. If in doubt, call an engineer.
Step 10 — If F1 persists after replacing the NTC probe and checking wiring, stop DIY. A persisting F1 at this point strongly suggests a faulty control board (PCB), which is not a safe DIY repair as it involves handling live mains-connected components. Contact a qualified appliance engineer and tell them: ‘My Candy oven is displaying an F1 error code. I have replaced the NTC temperature sensor and checked the wiring, but the fault persists.’
📞 When to call a professional
You should call a qualified appliance engineer if: (1) the F1 error returns immediately or persists after a full power reset; (2) you have replaced the NTC probe and the error is still present, as this points to a wiring loom or PCB fault; (3) you notice any burning smell, scorch marks inside the cavity, or signs of electrical arcing — do not use the oven and unplug it immediately; (4) you are not confident removing internal panels or using a multimeter safely. When calling an engineer, tell them: ‘My Candy oven [model number] is showing an F1 fault code. I believe it’s related to the NTC temperature sensor. I have [describe what you’ve already tried — e.g. reset the power / replaced the probe].” This saves diagnostic time and may reduce your call-out cost. Search for engineers on the Domestic & General approved repairer network, Checkatrade, or your local Which? Trusted Trader directory. This is an electric oven fault — you do not need a Gas Safe engineer unless your cooker also has a gas hob that requires attention separately.
⚖️ Repair or replace?
For most Candy ovens, an F1 error is a repairable fault and replacement is rarely necessary unless the oven is already old or the control board has failed. Here’s a practical breakdown: **DIY NTC sensor replacement** costs £10–£30 in parts and is viable for confident DIYers — parts are readily available for most Candy models up to around 10 years old. **Professional repair** for an NTC probe replacement typically costs £80–£150 all-in (call-out + labour + part) from an independent engineer. If the fault turns out to be a failed control board (PCB), expect to pay £150–£300 for a professional repair — at this price point, replacement becomes worth considering. **Replacement oven costs**: A comparable Candy built-in electric oven costs £250–£450 new. As a rule of thumb: if your oven is under 7 years old and the repair quote is less than 50% of a replacement oven’s price, repair is the sensible choice. If the oven is 10 years or older and the PCB has failed, replacement is likely better value — especially given that parts availability for older Candy models (pre-2015) can be limited. Always get a written quote from your engineer before authorising any PCB replacement work.