Vaillant F.32: no fan means no combustion, by design

What Does Error F.32 Mean?

Vaillant gives F.32 as the fan being faulty or not connected. On a room-sealed condensing boiler the fan is what draws combustion air in and pushes flue gases out, so the appliance cannot burn gas safely without it. The lockout is not the boiler being cautious; it is the only acceptable response to losing forced draught. Applies to: Vaillant ecoTEC gas boilers covered by the Vaillant United Kingdom fault code list This definition comes from Vaillant's fault code list for ecoTEC appliances in the United Kingdom. The same number means something else on other manufacturers and on some Vaillant ranges outside the ecoTEC family, so read it against the list printed inside the casing flap of your own boiler. Owner-safe checks: Listen at the start of an attempt and note whether any fan sound occurs at all, and whether it sounds as it used to. | Record the exact code and how many attempts produce the same result before you stop trying. | Check whether any recent service, part replacement, or electrical work preceded the fault. Qualified technician: Testing, cleaning, or replacing a boiler fan and its wiring is Gas Safe registered work on a sealed combustion appliance in the United Kingdom. | Resist the urge to take the front panel off for a look. On a room-sealed appliance that panel is a safety component, and opening it breaks the separation it exists to maintain.

Other Common Vaillant boiler — Vaillant ecoTEC gas boilers covered by the Vaillant United Kingdom fault code list Error Codes