Vaillant ecoTEC Plus System F.080 – The cold water inlet temperature sensor in the internal cylinder is defective.

F.080

The cold water inlet temperature sensor in the internal cylinder is defective.

Vaillant ecoTEC Plus System

Possible cause

Inlet temperature sensor defective or not connected

Measure

Check and, if required, replace the NTC sensor, plug, wiring harness and the PCB.

This code also applies to: