Vaillant F32 Fault

Vaillant F32 Fault

The Vaillant F32 error code indicates a fault with the fan or fan speed, highlighting an issue where the fan is not operating within the expected parameters. The fan plays a crucial role in the boiler’s operation, ensuring harmful gases are safely expelled from the boiler and fresh air is drawn in for combustion. An issue with the fan can affect the boiler’s efficiency and safety.

Causes of the F32 Error Code

  1. Faulty Fan: The fan itself may be malfunctioning due to wear and tear, mechanical failure, or blockages that restrict its movement.
  2. Electrical Issues: Problems with the electrical connections to the fan, such as loose wires or faults in the circuit, can affect the fan’s operation.
  3. Control Board Problems: The boiler’s printed circuit board (PCB) controls the fan speed. A fault in the PCB can lead to incorrect fan operation.
  4. Blocked Air Flows: Obstructions in the air intake or flue can restrict airflow, affecting the fan’s ability to operate correctly.

Troubleshooting and Resolving the F32 Error Code

  1. Inspect the Fan: Check for visible signs of damage or blockage that could be hindering the fan’s movement. Ensure the fan is clean and free from debris.
  2. Check Electrical Connections: Verify that all electrical connections to the fan are secure and in good condition. Loose or damaged wires should be repaired or replaced.
  3. Reset the Boiler: Attempt to reset the boiler to see if the error clears. Sometimes, a reset can resolve temporary glitches.
  4. Examine Air Flows: Ensure there are no blockages in the air intake or flue system. Removing any obstructions can help restore proper fan operation.
  5. Professional Diagnosis: Due to the complexity of diagnosing and repairing fan and PCB issues, it’s advisable to consult a Gas Safe registered engineer. A professional can safely assess the fan’s condition, test electrical components, and perform necessary repairs.
  6. Regular Maintenance: Prevent future occurrences of the F32 error by ensuring your boiler receives regular professional maintenance. Routine checks can identify and address potential issues with the fan, electrical connections, and airflow before they lead to faults.


The Vaillant F32 error code is a significant warning that requires prompt attention to ensure the boiler’s safe and efficient operation. While homeowners can perform basic inspections and a reset, most solutions for resolving a fan-related issue will necessitate professional intervention. Regular servicing is essential in maintaining the boiler’s performance and preventing issues like the F32 fault.