F.32 / F32 — Vaillant ecoTEC exclusive 832/838
What it means: The fan is not running at the speed the electronics expect.
Typical causes
- Fan blocked or seized
- Fan plug not seated properly
- Faulty hall sensor
- Damaged cable harness
- Faulty control board
When to treat it as unsafe
Treat as unsafe if the fan is not clearing flue gases correctly or the flue is suspect.
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NwadFix is not affiliated with or endorsed by Vaillant. Manufacturer and model names are used only to identify the appliances an entry refers to.
Last reviewed: 13 October 2026 by a Gas Safe Engineer
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