Tumble Dryer
F02
The F02 error code on an AEG tumble dryer indicates a fault with the appliance’s NTC temperature sensor — the component responsible for monitoring the heat inside the drum. While it can sound alarming, this fault ranges from a simple wiring issue to a failed sensor, and in many cases it’s a repair a confident homeowner can tackle. In this guide, we’ll walk you through exactly what F02 means, the most common causes specific to AEG dryers, safe DIY steps you can try today, and honest advice on when to call in a professional.
What does this error mean?
The F02 error code on an AEG tumble dryer signals that the appliance’s control board has detected a problem with the NTC (Negative Temperature Coefficient) thermistor — essentially the dryer’s internal thermometer. The NTC sensor continuously monitors the air temperature inside the drum and feeds that information back to the electronic control board so it can regulate the heating element. When the control board receives a reading that is outside the expected range — either an open circuit (no signal at all), a short circuit (a shorted sensor), or a wildly implausible temperature value — it throws the F02 fault and cuts the heating cycle as a safety precaution. In plain terms: your dryer can no longer trust its own temperature data, so it stops heating to prevent a potential overheat or fire risk. The drum may still tumble, but no heat will be produced until the fault is resolved.
Est. repair cost
DIY NTC sensor replacement: £10–£25 for the part. Professional repair (sensor or wiring fault): £60–£120. PCB replacement by engineer: £150–£250 total.
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Perform a hard reset first: Switch the dryer off at the wall socket, leave it completely unplugged for 10 full minutes, then plug it back in and run a short cycle. A transient electronic glitch can occasionally trigger F02, and a proper power reset (not just pressing the programme button) is always the right starting point. No tools needed.
Step 2 — Clean the lint filter thoroughly: Remove the lint filter (located at the door opening on most AEG models) and wash it under warm running water, using a soft brush to clear any residue. A severely blocked filter causes the dryer to overheat, which can stress the NTC sensor. Allow the filter to dry completely before reinserting it. No tools needed.
Step 3 — Clean the heat exchanger (condenser) if your model has one: On AEG condenser and heat pump dryers, open the bottom access panel (it unclips or uses a coin-slot latch) and remove the heat exchanger. Rinse it gently under a cold tap, allow it to dry, and refit it securely. AEG recommends doing this every 3–6 months — a blocked heat exchanger is a very common cause of temperature faults. No tools needed.
Step 4 — Check the exhaust hose (vented models): If you have a vented AEG dryer, inspect the exhaust hose at the back. Ensure it is not kinked, crushed, or longer than 2 metres, and that the external vent flap opens freely. A restricted exhaust causes heat to build up abnormally, putting stress on temperature components. No tools needed.
Step 5 — Check the condenser water container: Empty the water collection drawer fully if it is not plumbed in. An overfull container can sometimes cause drainage issues that lead to moisture reaching internal components. Rinse it out while you’re at it. No tools needed.
Step 6 — Inspect the visible wiring and sensor connection (only if you are comfortable and the dryer is unplugged): With the dryer unplugged from the mains, remove the back panel using a Pozidriv screwdriver. Locate the NTC temperature sensor — on most AEG dryers it is mounted on the rear of the drum housing or on the air outlet duct, and has a two-wire connector. Gently unplug and re-plug the connector to ensure a firm, clean connection. Look for any visibly burnt, chafed, or broken wires. If everything looks intact, refit the back panel and test the dryer. Tools needed: Pozidriv or cross-head screwdriver (size PZ2).
Step 7 — Test or replace the NTC sensor (DIY-confident users only, dryer unplugged): With the back panel removed and the dryer unplugged, disconnect the NTC sensor’s two-wire connector. Using a multimeter set to resistance (Ohms), test across the two terminals of the sensor. At room temperature (~20°C), a healthy AEG NTC sensor typically reads approximately 10,000–15,000 Ohms (10–15 kΩ). A reading of 0 Ohms (short circuit) or ‘OL’ / infinite resistance (open circuit) confirms the sensor has failed. Replacement AEG NTC sensors are widely available from UK spare parts suppliers (e.g. eSpares, 4ourhouse, Querspares) for £10–£25. Match the part number from your model’s rating plate. Tools needed: multimeter, Pozidriv screwdriver.
Step 8 — Replace the NTC sensor if confirmed faulty: The sensor is usually held in place by a single clip or screw and pulls off its mounting point easily. Fit the new sensor in the same orientation, reconnect the wiring loom, refit the back panel, and run a full test cycle. Ensure the dryer is fully reassembled and the back panel is secured before plugging back into the mains. Tools needed: Pozidriv screwdriver, possibly needle-nose pliers to release the clip.
Step 9 — If F02 persists after sensor replacement, stop DIY and call a professional: A recurring F02 after a confirmed sensor replacement strongly suggests either a wiring harness fault or a failing control board (PCB) — both of which require specialist diagnostic tools and are not safely repairable without appliance engineering experience. Do not attempt to replace the PCB yourself unless you are a qualified engineer.
📞 When to call a professional
You should call a qualified appliance repair engineer if: the F02 error returns immediately after a hard reset with no obvious cause; you’ve cleaned all filters and airways but the fault persists; your multimeter test shows the NTC sensor is healthy (ruling it out as the cause); or the F02 reappears after you’ve already replaced the sensor. These scenarios point to a wiring harness fault or a failing PCB — both of which require professional diagnosis. When you call, tell the engineer: the exact error code (F02), your AEG dryer’s full model number (found on the rating plate inside the door frame), and what steps you’ve already tried (reset, filter clean, sensor check). This will save diagnostic time and money. Search for an appliance repair engineer who is a member of the Domestic Appliance Service Association (DASA) or carries AEG/Electrolux brand experience, as AEG is manufactured under the Electrolux Group umbrella and parts knowledge is shared across the range.
⚖️ Repair or replace?
For most UK homeowners, repairing an F02 fault is the right call — provided the dryer is under 8 years old and in otherwise good condition. If the fix is simply a new NTC sensor, you’re looking at a very low-cost DIY repair (under £30 including the part). Even a professional call-out to replace the sensor should come in well under £100 in most of the UK. Where F02 is caused by a failed PCB, costs rise significantly: a replacement AEG control board can cost £80–£150 for the part alone, plus £50–£80 labour, pushing the total repair close to or beyond the cost of a new budget dryer. As a rule of thumb: if the dryer is under 5 years old, repair it. If it’s 5–8 years old, weigh the repair cost against a new machine — a decent AEG or equivalent condenser dryer starts at around £300–£400 in the UK. If it’s over 8–10 years old and the repair cost exceeds £150, strongly consider replacement, particularly as older AEG heat pump models may have parts availability issues. Always get a written quote before authorising any repair.