Honeywell Burner control unit S4565AM3058B

The Honeywell S4565AM3058B is a gas burner control unit designed for domestic heating installations. It is used with VK4105G gas regulators (EN2R-9025) to ensure safe ignition and flame control. This control box supports spark ignition systems (DBI) and features a hard lock, with options for modulation, two-level, or NTC input. It is compatible with Protherm boilers KLOM 16-20-30-40-50 and KLZ 15-20-30-40-13/14. The unit complies with European standards EN 298 and EN 60730-1.

Control boxes of this type are selected by matching the model to the boiler's specifications, including fuel type, ignition system, and safety features. Installation involves fixing the unit onto compatible gas regulators, such as the VK4105G, and ensuring proper electrical connections. Before ordering, verify the boiler model and the control box's type designation to ensure compatibility.

When such control units fail, the boiler may not ignite or may shut down unexpectedly. Common issues include hard lockouts that require manual reset, or soft lockouts that can be cleared by interrupting power. If the flame is not detected within the safe ignition time, the unit will lock out. Check the flame sensor and wiring for faults if the boiler repeatedly fails to start.