Common Questions Does this board replace the external time delay relay

making it suitable for both hot water and steam systems

The unit features a durable polymeric housing and a shaded pole motor designed for constant-duty performance in demanding HVAC environments

it is not polarity sensitive

the assembly includes a 3/8" NPT high pressure connection

Resideo 40003916-026 Replacement Motor 320735-701 Common Questions Does this boardThe 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