Oven
F5
The F5 error code on a Candy oven indicates a fault with the oven’s temperature sensor (NTC probe) or the control board’s ability to read it correctly. It’s a moderately serious fault — the oven will typically stop heating to prevent overheating or unsafe operation.
What does this error mean?
The F5 code means your Candy oven’s control board is detecting an abnormal signal from the temperature sensor (also called the NTC or thermostat probe). This sensor monitors the internal oven temperature and feeds data back to the control board. When the signal falls outside expected parameters — either a short circuit or an open circuit in the sensor — the oven throws F5 and shuts down the heating element as a safety precaution.
Est. repair cost
£15–£30 DIY sensor replacement; £120–£200 for professional PCB repair
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 – Hard reset: Switch the oven off at the wall socket or trip the circuit breaker, leave it off for 5–10 minutes, then restore power. A one-off glitch after a power cut will often clear with a reset alone.
Step 2 – Check for visible damage: Open the oven door and inspect the back wall and cavity for any obvious burn marks, melted plastic, or corrosion near the temperature sensor (a small metal probe, usually mounted on the back or side wall of the oven cavity). Do not touch internal wiring.
Step 3 – Inspect the sensor connector (caution – unplug first): After switching off and unplugging the oven, remove the back panel of the oven cavity (usually 2–4 screws). Check the wire connector at the NTC sensor for looseness, corrosion, or burn marks. Reseat the connector firmly if it’s loose.
Step 4 – Test the NTC sensor resistance: Using a basic multimeter set to resistance (Ω), measure across the two sensor terminals. At room temperature, a healthy Candy NTC probe typically reads around 10,000–12,000 ohms (10–12 kΩ). A reading of zero (short) or infinite (open circuit) confirms a faulty sensor.
Step 5 – Replace the NTC sensor: Candy oven NTC probes are widely available from UK spare parts suppliers (e.g. eSpares, 4ourhouse, Ransom Spares). Search your full model number to get the correct part. Replacement is straightforward — disconnect the old probe, unscrew it from the cavity wall, fit the new one, and reconnect. No soldering required.
Step 6 – If error persists after a new sensor: The fault likely lies with the main PCB. Do not attempt to repair the PCB yourself — this requires a qualified appliance engineer.
📞 When to call a professional
If replacing the NTC sensor does not clear the F5 code, stop DIY work and call a qualified appliance repair engineer — the control board (PCB) will need professional diagnosis and likely replacement. When booking, tell the engineer: ‘My Candy oven is showing an F5 error code — I’ve already replaced the NTC temperature sensor and reset the oven, but the fault remains.’ This saves diagnostic time. Also call a professional immediately if you notice any burning smell, scorch marks, or melted wiring.
⚖️ Repair or replace?
A DIY NTC sensor replacement is the cheapest fix at around £15–£30 for the part. If the PCB is at fault, professional repair typically costs £120–£200 including parts and labour — economically viable if your oven is under 8 years old. For ovens older than 8–10 years, weigh repair cost against a new single oven (£250–£500), particularly if other components are also ageing.