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Daniel HollowayAug 31, 2025
Why does my Viessmann Vitodens 111-W Boiler display fault code 0C?
- SStephanie HuffAug 31, 2025
If your Viessmann Boiler displays fault code 0C, it means the mains voltage is too low. Check the power supply.
Why does my Viessmann Vitodens 111-W Boiler display fault code 0C?
If your Viessmann Boiler displays fault code 0C, it means the mains voltage is too low. Check the power supply.
What does fault code E5 indicate on a Viessmann Vitodens 111-W?
If your Viessmann Boiler is displaying fault code E5, it indicates an internal fault. Check the ionisation electrode and connecting cables. You can also try pressing 'Reset'.
What causes fault code F0 on a Viessmann Vitodens 111-W Boiler?
If your Viessmann Boiler is displaying fault code F0, it indicates an internal fault. Replace the control unit.
Why Viessmann Vitodens 111-W burner in operation stops below the set boiler water temperature?
If the burner in your Viessmann Boiler stops below the set boiler water temperature and restarts immediately, check the flue system for tightness (flue gas recirculation) and check the gas flow pressure.
What could be the cause of Fault F4 in Viessmann Boiler?
If your Viessmann Boiler is showing Fault F4, check the ignition module connection. Also, check the gas train (control voltage 230 V) and gas supply pressure. Furthermore, check the ionisation current, the electrode adjustment, and the gas line for air-locks.
General| Type | Gas Condensing Boiler |
|---|---|
| Dimensions | 900 x 600 x 480 mm |
| Energy Efficiency Class | A |
| Mounting | Wall-mounted |
| Water Pressure | Max. 3 bar |
| Max. Flow Temperature | 80 °C |
| Efficiency | Up to 98% |
| Hot Water Storage | 46 liters |
| Fuel Type | Natural gas or LPG |
| DHW Output | Up to 200 liters in 10 minutes (depending on model and cold water temperature) |
