F.105
When replacing the gas valve assembly or replacing the PCB and the display at the same time, the gas valve assembly offset must be set according to the current gas valve assembly.
Vaillant ecoTEC Plus Combi
Possible cause
Gas valve assembly offset incorrectly stored in D.052 and, if applicable, D.182
Measure
Check the offset setting for the gas valve assembly.
Possible cause
Fault in the electrical connection for the gas valve assembly
Measure
Check the wiring harness between the PCB and gas valve assembly, incl. all plug connections.
This code also applies to: