Honeywell Gas boiler control unit S4964V2002U

The Honeywell S4964V2002U is a gas boiler control unit designed for use with Honeywell S4964V2002 systems. It operates on a supply voltage of 220–240 V and is intended for gas fuel applications. This control unit integrates ignition and flame control functions, working in conjunction with VK41 series gas regulators to manage burner operation. It supports both spark ignition and pilot burner configurations, offering flexible installation within a 90-degree angle from the vertical position of the actuator.

When selecting a control unit of this type, ensure compatibility with the specific gas regulator model and the boiler's electrical system. The unit must match the supply voltage (e.g., 220–240 V) and be designed for the fuel type (gas). Installation involves connecting the unit to the gas regulator via the designated connector, typically located at the top of the regulator. The control unit can be positioned at various angles up to 90 degrees from vertical, allowing for flexible placement. Always verify the exact model number and specifications against the original part before ordering.

Common failure modes for gas boiler control units include ignition failure, intermittent flame loss, or complete shutdown of the burner. Symptoms may include the boiler not igniting, the flame going out shortly after ignition, or the system repeatedly cycling on and off. Check for loose connections, damaged wiring, or signs of overheating on the control unit. If the unit fails to respond to power or commands, it may need replacement.