Display shows storage tank sensor error, cylinder temperature reading is incorrect

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

Failed cylinder NTC sensor on De Dietrich indirect tank, Sensor not fully inserted into pocket, Broken sensor cable, Water ingress into sensor pocket

Safety first: Isolate electrical power before working on the sensor.

Step-by-step checks:

Locate cylinder sensor: On De Dietrich storage tanks, the sensor is usually inserted into a dry well on the side of the cylinder.
Check insertion depth: Ensure the sensor is pushed fully into the pocket to get an accurate reading.
Inspect cable: Follow the cable back to the control unit, checking for damage or loose connectors.

When to call a professional: If the sensor is defective or the pocket is leaking, have it replaced by a technician.

Medium 3/5

Cylinder NTC Sensor

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