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Error code reference

AEG Washer Error Code E70

Heater not heating

AEG codesAEG washer codes

Heater not heating - NTC defective, maximum heating time exceeded, heating element defective, heater connection interrupted.

First step from the service manual

Replace NTC.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What E70 means on a AEG washer

The E70 error code on an AEG washer indicates a failure within the heating circuit. The washer's control board monitors water temperature using an NTC (Negative Temperature Coefficient) thermistor, which changes its electrical resistance as temperature rises or falls. If the NTC is defective, it sends inaccurate or no signal to the control board, preventing the machine from confirming that water is being heated. The board may also trigger E70 if the maximum allowable heating time is exceeded without reaching the target temperature, which points to a broader heating circuit failure.

The heating circuit consists of three primary components: the NTC sensor, the heating element itself, and the wiring connections between these parts and the control board. A defective NTC is the most likely culprit and is the recommended starting point for diagnosis. However, if the NTC tests within normal resistance parameters, attention should shift to the heating element for continuity and resistance, and to the wiring harness for any breaks, corrosion, or loose terminal connections that could interrupt the circuit.

Because E70 can result from multiple failure points in the heating system, a methodical approach is necessary. Replacing the NTC first is cost-effective given that the sensor is typically the weakest link. If the error persists after NTC replacement, the heating element should be tested with a multimeter for continuity. Open circuits in the element or damaged wiring between the heater assembly and the control board will also produce this fault.

Source: manufacturer service documentation.

Common causes of E70

  1. 01

    Defective NTC Temperature Sensor

    Part replacement

    The NTC thermistor is the most common cause of E70. A failed sensor sends incorrect resistance values or no signal at all, causing the control board to flag a heating fault even if the element itself is functional.

  2. 02

    Faulty Heating Element

    Part replacement

    A burned-out or failed heating element will prevent the water from reaching target temperature, causing the maximum heating time to be exceeded and triggering E70. The element should be tested for continuity with a multimeter.

  3. 03

    Maximum Heating Time Exceeded

    Wiring / connection

    If the water fails to reach the set temperature within the allowed time window, the control board logs E70. This can result from a partially failing element, very cold inlet water, or an undersized load scenario, but typically points back to a component fault.

  4. 04

    Interrupted Heater Wiring Connection

    Wiring / connection

    Loose, corroded, or broken terminals in the wiring harness connecting the heating element or NTC to the control board can interrupt the circuit and produce this fault. Inspect all connectors at the heater assembly and trace wiring for visible damage.

See the test procedure for each cause

Frequently asked questions about E70

What does E70 mean on a AEG washer?
E70 on an AEG washer indicates a fault in the heating circuit, meaning the machine detected that the water was not being heated correctly. The most common causes are a defective NTC temperature sensor, a failed heating element, or a broken wiring connection in the heater circuit. The washer uses the NTC to monitor water temperature, and if that signal is missing or incorrect, the fault is logged. The machine will not complete heated wash programs until the issue is resolved.
Can I fix E70 on my AEG washer myself?
Replacing the NTC sensor is a relatively accessible repair for a technically confident DIYer, as it typically involves removing the back panel and disconnecting a small plug-in sensor near the heating element. Testing and replacing the heating element requires working safely with mains-voltage components and using a multimeter for continuity checks. If you are not comfortable with electrical testing or working inside appliances, a qualified technician should perform the repair.
Is it safe to use my AEG washer when E70 is displayed?
You should avoid running heated wash cycles when E70 is active, as the machine cannot confirm proper heating, and laundry may not be cleaned or sanitized effectively. Cold wash programs may still run, but the underlying fault should be diagnosed and repaired promptly. Continuing to run the machine without addressing the fault could allow a wiring or component issue to worsen over time.
How much does it cost to repair an AEG washer E70 error?
If only the NTC sensor needs replacement, parts and labor costs are typically in the range of $50 to $150 depending on your region and whether you do the repair yourself. If the heating element has failed, total repair costs including parts and labor generally range from $150 to $350. Wiring repairs vary depending on the complexity of the damage found.
Will resetting my AEG washer clear the E70 error code?
A power reset may temporarily clear the E70 code, but it will return as soon as the washer attempts a heated cycle and encounters the same fault condition again. The error will persist until the defective component, whether the NTC sensor, heating element, or wiring connection, is actually repaired or replaced. Resetting without repairing is not a solution and the washer will continue to fail heated wash programs.

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