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F.32

Fan fault

The boiler has detected a fault associated with the combustion fan system.

What this code means

The boiler has detected a fault associated with the combustion fan system.

Possible causes

  • Fan defective
  • Fan plug or wiring harness fault
  • PCB issue

Common symptoms

  • F.32 displayed
  • Boiler may fail to ignite or lock out

Checks to make

  1. Do not remove the boiler casing
  2. Arrange diagnosis by a Vaillant engineer or suitably qualified heating engineer

Safety

  • The fan is part of the combustion and flue-safety system. Internal diagnosis must be left to qualified personnel.

Model notes

Vaillant lists fan, plug/harness and PCB issues as possible causes.