Vaillant · ecoTEC plus Boilers
There's an interruption with the flow sensor NTC. This could be due to a disconnected plug, a loose connection on the PCB, a break in the cable, or a defective sensor.
Click steps to track your progress.
Check that the NTC sensor is connected properly and securely.
Check the resistance of the NTC sensor (requires specialist tools).
Check the continuity of the wiring harness connected to the NTC sensor (requires specialist tools).