Tumble Dryer
F03
The F03 error code on a Candy tumble dryer indicates a fault with the temperature sensor (NTC sensor), meaning the appliance cannot accurately read the drum temperature. It will stop mid-cycle as a safety measure, but it’s a relatively common fault that’s often DIY-fixable.
What does this error mean?
F03 signals that the NTC (Negative Temperature Coefficient) thermistor — the component that monitors the heat inside the drum — is sending a reading outside the expected range. The dryer’s control board interprets this as either a shorted or open-circuit sensor and shuts down to prevent overheating. This is a safety-first response, not a catastrophic mechanical failure.
Est. repair cost
£10–£25 DIY (NTC sensor part only); £80–£150 professional repair for sensor/wiring; £150–£220 if control board replacement is needed
🔍 Likely causes
🛠️ Step-by-step fix
Reset the dryer: unplug it from the mains, wait 10 minutes, then plug back in and run an empty cycle. A transient glitch can trigger F03 and a reset clears it.
Clean the fluff filter and condenser unit thoroughly. A blocked condenser is the second most common trigger — remove the condenser drawer, rinse it under a tap, and let it dry before refitting.
Check the drum isn’t overloaded. Candy recommends not exceeding the rated load (usually 8–10 kg depending on model). Run a smaller load and see if the error returns.
Inspect the NTC sensor wiring: unplug the machine, remove the back panel (4–6 screws), locate the NTC sensor on the heating duct, and check the connector is firmly seated and free from corrosion. Reseat it if loose.
Test or replace the NTC sensor: a replacement Candy NTC thermistor costs £10–£25 online (search your model number). It clips or screws onto the heating duct and connects via a 2-pin plug — no soldering required. Confirm the part number matches your model before ordering.
If the error persists after a new sensor, do not attempt to open or replace the main control board yourself — call an engineer at this point.
📞 When to call a professional
Call a professional if the F03 code returns after you’ve cleaned the condenser and replaced the NTC sensor, as the fault likely lies with the main control board or wiring harness — both requiring specialist diagnosis. When calling, tell the engineer you have a Candy tumble dryer showing F03, that you’ve already replaced the NTC sensor, and give them your full model number (printed on the door frame sticker). Expect a visit charge of £50–£80 before parts.
⚖️ Repair or replace?
An NTC sensor replacement is a low-cost DIY repair at £10–£25 for the part, making it worth attempting on any machine. If the control board is the culprit, professional repair typically costs £150–£220 including labour — on a dryer over 8 years old, this may exceed 50% of a new machine’s cost (entry-level Candy dryers start around £250–£300). For machines under 6 years old, repair is generally the right call; for older machines needing a new board, consider replacing.