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F.62

Fault: Fuel valve switch-off delay

Vaillant ecoTEC Pro 30 Combi

Possible cause
Delayed switch-off sequence for the gas valve after the flame is extinguished
Measure
Check: Gas valve, surface of the burner (dirt), plug, cable harness, PCB.
This code also applies to:
ecoTEC Pro 24 CombiecoTEC Pro 28 Combi
Source: Manufacturer manual (PDF)
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