Display shows sensor open-circuit error, temperature reading extremely low or -40°C

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.

Possible Causes

Disconnected NTC sensor on De Dietrich unit, Broken sensor lead, Corroded connector, Failed NTC element

Safety first: Isolate power before handling wiring.

Step-by-step checks:

Reseat connectors: Unplug and replug the suspected sensor connector at both the sensor and the control board.
Check for broken wires: Gently tug each wire; if it stretches or breaks, the cable is damaged and must be replaced.

When to call a professional: Replacement of the NTC sensor or harness is recommended if the fault persists.

Medium 3/5

NTC Temperature Sensor

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