Boiler displays E10, internal temperature sensor or limit fault

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

Defective internal NTC on De Dietrich heat exchanger, Wiring fault to sensor, PCB analogue input failure, Sensor not correctly mounted

Safety: Isolate power and allow boiler to cool before accessing sensors.

Steps:

Locate internal sensor: Identify the NTC sensor on the heat exchanger or flow pipe.
Check mounting and wiring: Ensure good contact with the metal surface and secure wiring.
Reset boiler: After reseating, restore power and reset.

Professional help: If E10 persists, a technician should test the sensor resistance and replace the sensor or PCB as needed.

Medium 3/5

Primary NTC Sensor

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