Error F.32

Safety precautions:

1. Do not attempt to bypass or modify safety controls. Running the boiler with a confirmed fan or flue fault is unsafe.

2. Before doing any checks, switch the boiler to standby or off at the programmer and turn off electrical power to the boiler at the isolator. If you are unsure, leave electrical isolation to a professional.

3. Do not remove the boiler cover or attempt internal electrical or gas work unless you are a Gas Safe registered engineer.

Initial homeowner checks (safe, external, non-intrusive):

1. Note exact code and symptoms: is it F32 or F.32, is there a humming noise, and does the boiler lock out immediately or after trying to run?

2. Visually inspect the external flue terminal for obvious blockages: birds nests, leaves, ice, snow or objects sitting over the terminal. Remove external obstructions if it is safe to do so.

3. Check external air intake/ventilation points around the boiler are not blocked.

4. Look for signs of water ingress or damp around the top of the boiler or near the flue and condensate pipe. If you see water inside the flue area or electronics, do not power the boiler again and call an engineer.

5. Check the condensate pipe (if fitted) for freezing or blockage; a blocked condensate can cause other faults though not always F32.

6. If the boiler is reporting F32 and you have performed the safe visual checks above, try a controlled reset: switch the boiler fully off at the isolator, wait 1–2 minutes and switch back on, then put the boiler into normal mode. Only reset after you have checked the flue and the area for obvious causes. If the fault returns immediately, stop and call a professional.

Diagnostic and fix steps that an engineer will perform (do not attempt unless qualified):

1. Confirm fault history and replicate the error using the boiler diagnostics.

2. Measure voltages and signals between the PCB and the fan to identify communication or supply faults.

3. Inspect the fan assembly for free rotation, bearing wear, motor seizure or damage, and check for moisture damage to the fan electronics.

4. Remove and inspect the flue internally for blockages, collapsed sections, poor joints, or evidence of water ingress. Check flue terminals and any guards or condensate traps.

5. Inspect the boiler for signs of flue water runback or leaks that could have damaged the fan or PCB and remedy the flue installation if required.

6. Replace the fan assembly if mechanically or electrically faulty, then re-test. If the fan is OK but not detected, further PCB diagnosis is required; the PCB may need repair or replacement if communication faults are confirmed.

7. After repair, the engineer will reset the boiler, run it through service and ignition checks, and confirm safe flue gas evacuation and correct operation under load.

When to call a professional:

- Call a Gas Safe registered engineer if the F32 fault persists after the external checks and reset, if you find evidence of water ingress, or if you hear persistent humming or grinding noises. Internal fan replacement, PCB testing, and flue rework are specialist tasks requiring a qualified engineer. Do not attempt internal repairs or electrical tests yourself.

Other important notes:

- Fan assemblies are generally durable; failure often points to an external cause such as water ingress or flue problems. The engineer should investigate and fix the root cause, not just replace the fan.

- After any repair the boiler must be reset and tested by the engineer before normal use is resumed.