Honeywell Gas boiler control unit S4962CM2020U

The Honeywell S4962CM2020U is a gas boiler control unit designed for use with the GAZ 3000 boiler. It operates at a supply voltage of 220–240 V and is compatible with the VK41 series gas regulators. This control board integrates ignition and flame control functions, ensuring safe and efficient burner operation. It features a two-position electric actuator and is an OEM equivalent to part number 87083002440.

When selecting a replacement control board of this type, ensure the supply voltage matches the boiler's electrical system (typically 220–240 V). The board must be compatible with the specific gas regulator series used in the boiler, such as the VK41 series. Installation involves connecting the board to the regulator via the designated connector, and the board can be positioned within a 90° angle from the vertical axis of the actuator. Verify the actuator type and mounting orientation before ordering.

Common failure modes for this type of control board include ignition failure, intermittent flame loss, or no response from the burner. The boiler may fail to start, or the burner may shut down unexpectedly during operation. Check for loose connections, damaged wiring, or signs of overheating on the board. If the board is faulty, it typically needs to be replaced with a compatible model.