Resideo - Honeywell Home 40003916-521 Zone Valve Power HeadZone Valve Power Head by Resideo Honeywell Home 40003916 521 delivers precise, dependable control for 2 Way motorized zone valves. Designed to work with the V8043A 5000 Series, this power head ensures smooth actuation and reliable valve positioning across heating or cooling systems. For compatibility with modern control boards, the 24V AC supply ensures quick relay operations and precise valve travel. The unit operates at 24 Volt AC (50 60 Hz), making

Rating: 120 V @ 5

it features SPST 2-circuit contacts

Electrical: Auxiliary screw terminal connection

Speed: 800 RPM

The internal construction features NBR/PTFE seals

Engineered for quick field service

This thermostat is suitable for gas

and radiant heating systems

07 inch WG resistance at 300 FPM

LED indicators for quick status checks

ensuring compatibility with AO Smith systems and similar heater configurations

you get a genuine replacement part that restores the appearance and service life of your furnace or air handler