Resideo 40003916-026 Replacement Motor

The Resideo 40003916-026 Replacement Motor is a heavy-duty 24Vac synchronous actuator designed for the V8043E Series Zone Valves. As a direct field replacement for the legacy 40004850-001 (which featured the original metal cover assembly), this powerhead ensures seamless integration with existing hydronic heating infrastructures. Engineers and contractors rely on the 40003916-026 for its integrated SPST end switch, which provides critical signaling to the circulator or burner once the valve reaches the fully open position. This 2-way zone valve motor features 18-inch color-coded leadwires and a manual opening lever, allowing for simplified hydronic zone valve troubleshooting and system filling. Rated for ambient temperatures up to 125°F, this low voltage HVAC motor maintains high-torque performance under continuous duty cycles, ensuring reliable flow control for baseboard radiation and convector applications.

Key Benefits

• Direct Replacement: Purpose-built to replace the 40003916-026/U and the older 40004850-001 metal-lidded actuators.
• Integrated End Switch: Includes a factory-installed auxiliary switch (4.4A @ 120V) for automated boiler and pump sequencing.
• Easy Installation: Equipped with 18-inch leads and a universal mounting design compatible with Resideo V8043E valve bodies.
• Manual Override: The manual lever allows for temporary bypass during power outages or initial system purging.
• Standardized Electricals: Operates on 24V (50/60 Hz) and utilizes 4-wire connections for standard thermostat integration.

Common Questions

Can I use the 40003916-026 to replace a 2-wire motor?
No, this model is a 4-wire actuator with an end switch. If your existing setup does not use an end switch, you would need the 40003916-021. However, many technicians upgrade to this unit to gain the signaling capability for the circulator relay.

Does this fit the older 3-screw or newer 2-screw valve bodies?
The 40003916-026 is designed for modern 2-screw powerhead mounting. If you are servicing an older style 4-screw valve body, a conversion kit (40003918-006) may be required to adapt the new head to the old body.

Is the motor compatible with 3-way valves?
This specific powerhead is engineered for 2-way V8043E valves only. It is not compatible with V8044 series 3-way diverting valves, which require different internal gearing and travel limits.

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.