How much does it cost to fix Vaillant error code F.32?

Typical repair cost for the Vaillant F.32 fault is £180-350 including labour.

F.32 High

Vaillant F.32 Fault Code

Q: What does the Vaillant F.32 fault code mean?

Your boiler's fan is struggling to spin at the correct speed, which prevents the unit from starting up safely to heat your home.

Also written as F32 — same fault.

The Vaillant F.32 fault code means: your boiler's fan is struggling to spin at the correct speed, which prevents the unit from starting up safely to heat your home.. It appears on 52 Vaillant models in our database.

Technical description: Fan turning–speed malfunction (too fast at start–up) | Cause: Fan unit obstructed, plug–in fan connector not correctly inserted, Hall sensor defective, fault in cable loom, defective electronic control system

What causes the Vaillant F.32 fault?

This fault occurs when the boiler’s control board detects that the fan is spinning at an incorrect speed, preventing it from safely clearing waste gases from the system. The most common reason is a mechanical failure within the fan motor or a buildup of dust and debris that hinders its movement. It can also be caused by a communication error where the electronic sensors fail to report the fan's speed accurately to the main computer.

Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Vaillant models that show the F.32 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Vaillant F.32 fault code information on this page is sourced and cross-checked against the official Vaillant service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026