Honeywell 40003916-024 Replacement Motor

The Honeywell 40003916-024 is a direct replacement motor and powerhead assembly designed for the V4043A Series of two-way, normally closed zone valves. Operating at 120Vac and 60 Hz, this electric actuator features 18-inch leadwires and an integrated manual lever for system bypass during power failures or maintenance. As a spring return component, it ensures the valve reverts to its closed position upon de-energization, maintaining reliable flow control in hydronic heating and cooling systems. The 40003916-024 is technically identical to the 40003916-024/U model, facilitating a seamless swap for field repairs. This head allows for replacement on newer series 6 valve bodies without draining the system, though older series 1-5 bodies may require a 40003918 conversion kit. It supports a maximum ambient temperature of 125°F and is built for consistent on/off operation in industrial and residential HVACR environments. Rely on this authentic Honeywell component to restore precise zoning and valve actuation without the need for extensive repiping.

• Compatible with V4043A zone valve bodies for efficient two-position control.
• Features high-temp 18-inch leadwires mounted on the manual lever side for easy wiring access.
• Equipped with a spring return to close action to protect against unintended flow during power loss.
• Includes a manual opening lever for manual override and system draining/filling.
• Designed for rapid field replacement on "new style" valve bodies without the need to drain the loop.

Is the 40003916-024 compatible with my existing valve?
This powerhead is specifically engineered for the Honeywell V4043A series. If you are working with an older valve body (Series 1 through 5), you will need the 40003918 conversion kit to ensure the new head seats correctly on the existing shaft.

What is the difference between the 40003916-024 and the 40003916-024/U?
There is no technical difference between these part numbers. The "U" suffix typically denotes "Universal" or retail packaging, but the internal motor specifications and wiring remain identical.

Does this unit require me to drain the hydronic system?
For newer "Series 6" bodies (identifiable by a small bump on the cover), you can swap the replacement motor head without draining. If your valve lacks this feature, draining is required unless you have isolation valves installed.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.