Viessmann D6 Error Site

If the gas pressure entering your property drops unexpectedly, the flame will sputter or go out completely. The boiler detects this sudden flame loss during operation and displays the D6 code. 4. Poor Electrical Grounding (Earthing)

The Viessmann D6 error code indicates a , meaning your boiler's control unit has detected that the burner fan is running, but the pressure switch failed to close or open at the correct time. This safety mechanism prevents the boiler from operating when flue gases cannot be safely evacuated. viessmann d6 error

: Run an air-venting routine on the system's automated venting program or manually bleed trapped air from high-point radiator valves. If the gas pressure entering your property drops

: Often, a flue gas damper, mechanical draft hood, or an external gas safety valve is wired to DE1. If that external device fails its startup routine, it opens the safety circuit. Poor Electrical Grounding (Earthing) The Viessmann D6 error