E018
Neff Humidity / Steam Sensor Error

Microwave shows E018 and the sensor cooking or automatic programs do not start.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed humidity sensor, Blocked sensor port with grease or food residue, Wiring fault between sensor and control board, Sensor out of calibration

How to Fix / Troubleshooting

Safety: Unplug before removing covers.

Cleaning and inspection:

  • Locate the humidity/steam sensor (often behind a small grille inside the cavity or in the top area).
  • Clean the sensor opening and surrounding area with a mild detergent and soft cloth. Do not saturate with water.

Sensor testing:

  • Access the sensor from the top or side by removing the outer cabinet.
  • Check the sensor connector and wiring for secure fit and no corrosion.
  • Measure the sensor resistance or output according to Neff service data; replace if out of specification.

After replacing the sensor, clear the error by disconnecting power briefly. If E018 remains, the control PCB's sensor input circuit may be defective.

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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor
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