Viessmann gas boiler F9: what it means and when to call a pro · Finland
Severity: Stop nowViessmann gas boiler error F9. The fan is faulty or is not reaching the correct speed.
Meaning
The fan is faulty or is not reaching the correct speed.
Severity
Stop now
Stop. Switch it off and call a pro
Steps are not shown for this code because no qualified person has reviewed them yet. What is safe: switch it off and call a pro.
Source
Vitodens 100-W B1HA quick guide (fault codes), Viessmann
The repair: Boiler fan fault repair
Prices for repairs in Finland are in EUR.
Other Viessmann codes
- Viessmann F2 The boiler has overheated and the safety thermostat has shut it down.
- Viessmann F4 The boiler failed to ignite (no flame was detected) and has locked out for safety.
Brands in our catalog for gas boiler: Ariston, Baxi, Bosch, Ferroli, Ideal, Potterton, Vaillant, Viessmann, Worcester Bosch. The same code on another brand is not in the catalog yet, and we do not guess what it means.