Viessmann · Vitodens 200-W B2HB Boiler
The boiler displays Fault EE when there is an issue with ignition, the gas combination valve, or the ionization current during the startup sequence. This means the burner is not able to establish or maintain a flame.
Click steps to track your progress.
Check the gas supply to the boiler to ensure it is open and at adequate pressure.
Verify the ignition electrode is correctly adjusted and positioned.
Inspect the gas line for any signs of airlocks or blockages.
Check the flue gas system for tightness and any signs of recirculation.
If the issue persists, a qualified technician should check the ignition module and gas train control voltages.