Tumble Dryer
F03
The F03 error code on an Electrolux tumble dryer signals a temperature sensor (NTC sensor) fault — specifically that the appliance is detecting an abnormal temperature reading during a cycle. It’s a moderately serious fault that will prevent your dryer from running safely until it’s resolved.
What does this error mean?
The F03 code means the dryer’s NTC (Negative Temperature Coefficient) thermistor — the component that monitors internal drum temperature — is sending a reading that falls outside the expected range. The control board sees this as either a short circuit or open circuit in the sensor, and shuts the machine down to prevent overheating. In plain terms: the dryer doesn’t trust its own temperature readings, so it refuses to run.
Est. repair cost
£10–£25 DIY (NTC sensor part only) or £80–£160 professional repair including call-out
🔍 Likely causes
🛠️ Step-by-step fix
Reset the machine first: switch it off at the wall, leave it unplugged for 5 minutes, then restart. A temporary sensor glitch can sometimes self-clear.
Clean the lint filter thoroughly — a blocked filter is one of the most common triggers for temperature-related faults. Remove it, wash it under the tap, and let it dry fully before reinserting.
On condenser models, remove and clean the heat exchanger (condenser unit). It’s usually behind a flap at the bottom front. Rinse it under a running tap until the water runs clear, allow to dry, then refit.
Check the dryer isn’t tucked into a tight alcove with no airflow. The machine needs at least 5cm clearance on all sides. Poor ventilation causes genuine overheating that trips the NTC sensor.
If the error persists after cleaning, the NTC sensor itself is likely faulty. Replacement sensors for Electrolux models typically cost £10–£25 online (search your model number + ‘NTC sensor’). This involves accessing the back panel — if you are comfortable with basic appliance repairs and the machine is unplugged, this is a manageable DIY job; otherwise, call a professional.
If replacing the sensor doesn’t clear the code, the control board or wiring loom is suspect — stop DIY at this point and call an engineer.
📞 When to call a professional
Call an engineer if the error code returns after cleaning all filters and replacing the NTC sensor, or if you notice any burning smell, scorching marks, or visible damage to internal wiring. When booking, tell the engineer: ‘My Electrolux tumble dryer is showing an F03 fault code — I believe it’s an NTC temperature sensor issue.’ This saves diagnostic time and may reduce your call-out cost.
⚖️ Repair or replace?
A professional repair for an F03 fault — covering call-out, diagnosis, and NTC sensor replacement — typically costs £80–£140 in the UK. If the control board is at fault, expect £130–£200+. If your dryer is over 8 years old and repair costs exceed 50% of a new equivalent model (budget condenser dryers start around £250–£300), replacement is the more sensible investment. For machines under 5 years old in otherwise good condition, repair is almost always worth it.