F.62 — Fault: Gas valve switch-off delay

What does F.62 mean?

The boiler has detected a delayed shutdown of the gas valve or a delayed extinguishing of the flame signal. This is a safety concern as gas flow should stop immediately when required.

• Delayed shutdown mechanism of the gas valve.
• Flame signal remaining active longer than expected.
• Gas valve is leaking or the main electronics are defective.

Click steps to track your progress.

1. 1

   Press the fault clearance key on the boiler to reset it.

2. 2

   Ensure there are no unusual smells of gas around the boiler.

3. 3

   If the fault persists, contact Vaillant Service Solutions immediately, as this is a critical gas safety issue.