Dishwasher
E11
The E11 error code on an AEG dishwasher indicates a problem with the water heating system — specifically, the dishwasher isn’t detecting that the water is reaching the correct temperature. It’s a moderately serious fault that will stop your machine from completing a wash cycle properly.
What does this error mean?
E11 means the dishwasher’s control board has registered that the water temperature hasn’t risen to the required level within the expected timeframe. This is usually monitored by the NTC temperature sensor (thermistor), which feeds live temperature data to the control board. If that sensor is faulty, damaged, or the heating element has failed, the machine throws E11 and halts the programme to prevent poor wash results or damage.
Est. repair cost
£80–£150 professional repair; £10–£25 DIY NTC sensor replacement part
🔍 Likely causes
🛠️ Step-by-step fix
Reset the dishwasher: switch it off at the mains, wait 60 seconds, then turn it back on and start a fresh cycle. A one-off software glitch can trigger E11 and a reset often clears it.
Run a hot maintenance wash: add a dishwasher cleaner or a cup of white vinegar to an empty machine and run it on the hottest cycle (usually 70°C). Heavy limescale on the heating element can trigger E11 — this may dissolve it.
Check and clean the filter assembly: a blocked filter forces the pump to work harder and can indirectly affect heating performance. Remove the filter at the base of the machine, rinse it under the tap, and refit it firmly.
Inspect the wiring connections at the NTC sensor: if you’re comfortable doing so, pull the dishwasher out, remove the lower kick panel, and check the wire connector on the sensor (located near the heating element at the base of the tub) for loose or corroded pins. Reseat the connector firmly. Do NOT open any sealed electrical components or tamper with the control board.
Test or replace the NTC thermistor: a replacement AEG-compatible NTC sensor costs £10–£25 from UK spare parts suppliers (eSpares, 4ourhouse). With basic DIY confidence, it’s a straightforward swap — disconnect the old sensor’s connector, unscrew it, fit the new one. Always isolate the appliance from the mains first.
If the heating element is suspect (no visible damage to the sensor, and reset/descale haven’t helped), this requires a multimeter test and element replacement — a job best left to a professional unless you have appliance repair experience.
📞 When to call a professional
Call an appliance engineer if the error persists after a reset, descale, and filter clean — or if you suspect the heating element or control board is at fault. Tell the engineer you have an E11 code and that you’ve already ruled out limescale and a sensor connector issue. Expect them to bring an NTC sensor and test the heating element resistance on the visit.
⚖️ Repair or replace?
A professional repair for E11 — typically an NTC sensor or heating element replacement — costs £80–£150 in the UK including labour. If your AEG dishwasher is under 7 years old, repair is almost always worth it; AEG is a premium brand with good parts availability. If the machine is 10+ years old and the heating element has failed, weigh the repair cost against a new mid-range dishwasher (£350–£600), especially if other components are showing wear.