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Error code reference

AEG Washer Error Code E37

Measurement circuit of dry run protection 1 always 0V.

AEG codesAEG washer codes

Measurement circuit of dry run protection 1 always 0V.

First step from the service manual

Replace electronics.

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

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What E37 means on a AEG washer

Error code E37 on an AEG washer indicates that the measurement circuit for dry run protection 1 is reading a constant 0V signal. Dry run protection is a safety system designed to detect whether there is sufficient water in the drum before allowing the heating element to operate. When this circuit continuously outputs 0V, the control board interprets this as a failed sensor signal, meaning the protection system cannot confirm safe operating conditions for heating. This is a circuit-level fault rather than simply a failed sensor reading.

The dry run protection circuit typically relies on a pressure or water-level sensing component feeding a signal back to the main electronics board. A constant 0V reading indicates the signal line is either shorted to ground, completely open, or the electronics board itself is unable to read any input from the circuit. Because the fault is described as "always 0V," this points to a persistent electrical failure rather than an intermittent drop in signal.

The first diagnostic step specified for E37 is direct replacement of the electronics board. This reflects that the fault is localized to the measurement circuit within the control electronics rather than the sensing component itself. Before replacing the board, technicians should inspect the wiring harness connecting the dry run protection sensor to the PCB for any visible damage, pinched wires, or corroded connectors, as these can produce the same constant 0V symptom at a lower repair cost.

Source: manufacturer service documentation.

Common causes of E37

  1. 01

    Failed main electronics board

    Part replacement

    The PCB measurement circuit for dry run protection 1 has failed internally and is outputting a constant 0V signal. This is the primary cause indicated by the error code, and board replacement is the recommended first corrective action.

  2. 02

    Wiring harness fault

    Wiring / connection

    A damaged, pinched, or corroded wire between the dry run protection sensor and the PCB can cause a permanent 0V reading. Inspect the harness routing for visible damage and check connector pins for corrosion or pushed-back terminals.

  3. 03

    Short to ground in the signal circuit

    Wiring / connection

    If the signal wire carrying voltage from the protection sensor is shorted to ground somewhere along its path, the PCB will read a constant 0V. Use a multimeter to check continuity between the signal wire and chassis ground with the connector unplugged.

  4. 04

    Faulty connector at the PCB

    Wiring / connection

    Corrosion or a loose connection at the PCB connector can interrupt the signal entirely, producing a 0V reading. Reseating or cleaning the connector may resolve the fault before full board replacement is attempted.

  5. 05

    Defective dry run protection sensor

    Part replacement

    Although the error points primarily to the measurement circuit, a completely failed sensor that outputs no voltage could also produce a 0V reading at the board. Testing the sensor output independently can help rule this out before replacing the PCB.

See the test procedure for each cause

Frequently asked questions about E37

What does E37 mean on a AEG washer?
E37 means the measurement circuit for dry run protection 1 is reading a constant 0V signal. Dry run protection monitors water presence before allowing the heating element to activate. This error indicates a circuit-level failure, most commonly within the main electronics board, that prevents the safety system from functioning correctly.
Can I fix E37 on my AEG washer myself?
Basic checks such as inspecting the wiring harness for damage and reseating connectors can be done by a confident DIYer. However, if those steps do not resolve the fault, the repair requires replacing the main electronics board, which involves working with internal electrical components. Most homeowners will want a qualified technician to handle the board replacement.
Is it safe to keep using my AEG washer when E37 is displayed?
It is not recommended to continue using the washer while E37 is active. The dry run protection circuit is a safety system that prevents the heating element from operating without adequate water. Running the machine with this circuit failed could allow the heater to operate unsafely or may cause the washer to halt mid-cycle without warning.
Will resetting my AEG washer clear the E37 error?
A reset is unlikely to permanently clear E37 because the fault is caused by a hardware failure in the measurement circuit rather than a temporary software or sensor glitch. The error will typically return as soon as the machine attempts to check the dry run protection circuit again. The underlying electrical fault must be resolved first.
How much does it cost to repair an E37 error on an AEG washer?
Repair costs vary depending on whether the issue is a wiring fault or a full board replacement is needed. A wiring repair or connector fix may cost relatively little in labor. If the main electronics board requires replacement, parts and labor combined typically range from around $150 to $400 or more, depending on the specific model and local labor rates.

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