F.010
The flow temperature sensor has short-circuited.
Vaillant ecoTEC Plus System
Possible cause
Fault in the electrical connection for the flow temperature sensor
Measure
Check and, if required, replace the wiring harness between the PCB and sensor, including all plug connections.
Possible cause
Flow temperature sensor defective
Measure
Check and, if required, replace the flow temperature sensor.
This code also applies to: