Honeywell DKO976-N mod.05 416005 control box

The Honeywell DKO976-N mod.05 416005 control box is a burner control (flame safeguard) listed under catalogue article 852.124.211 and manufacturer codes 0416005U / 852.124.211. This type of component manages the entire ignition and safety sequence for gas or oil burners: it initiates pre-purge, opens the fuel valve, activates the ignition transformer, monitors the flame signal, and locks out the burner if flame is not proven within the safety time. The control also reads the air pressure switch and may drive the fan or other actuators. Parts of this type are selected by exact series and type designation, supply voltage, safety and pre-purge times, and flame detection method—typically ionisation for gas or UV/IR for oil or industrial burners. The base or plug pattern must also match the burner wiring. A control box from one series is normally not interchangeable with another, even from the same brand, because mismatched safety times create a safety hazard rather than a mere compatibility issue. For modern wall-hung boilers, an electronic control board (PCB) performs the same role but is matched to the specific boiler model. When replacing a control, always verify the original part number and specification against the burner documentation.