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F32

F32 Fault — Fan not working

Vaillant · ecoTEC plus Boilers

What does F32 mean?

The fan is not operating correctly, possibly due to loose connections, a blocked fan, a defective Hall sensor, or faulty electronics.

Common Causes

  • Plug on fan not correctly plugged in
  • Multiple plug on PCB not correctly plugged in
  • Break in cable harness
  • Fan blocked
  • Hall sensor defective
  • Electronics defective

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the plug on the fan is correctly and securely plugged in.

  2. 2

    Check the 24V DC between the red and blue wires on the fan (requires specialist tools).

  3. 3

    Check the 6-15V DC between the grey and blue wires on the fan (requires specialist tools).

  4. 4

    If voltages are fine, the fan itself is likely faulty and needs replacement (contact a technician).

Browse all codes in this manual (100)
Verified technical data. Last updated: April 2026

Related Faults

F.0F.0 — Flow–NTC open circuitF.1F.1 — Return–NTC open circuitF.10F.10 — Flow NTC short circuit
Source: Vaillant ecoTEC plus Boilers
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