🔧EFFICIENT COMFORT MOTORIZED ZONE VALVE – Includes 802360JA motor, valve assembly, 4 mounting screws(2 for each of the 2 types), and detailed instructions. Comes in a protective plastic storage box for safe shipping.You can search for detailed installation videos on video-sharing and streaming platforms like YouTube. 🔄ZONE VALVE CONTROL PRECISE HVAC FLOW MANAGEMENT –This replacement head features a Normally Closed (NC) design, remaining securely closed without power to prevent leaks. When the thermostat or Boiler detects a temperature deviation, it sends a 24V AC signal to energize the valve, overcoming the internal spring mechanism to open and allow chilled/hot water flow to the fan coil. Upon reaching the set temperature, power is cut and the spring instantly recloses the valve. This automatic open-close cycling maintains precise room temperature control while optimizing energy efficiency. ⚙️SUITABLE FOR HVAC BOILER SYSTEMS –OEM 40003916-048 replacement power head fits V8043F1036 zone valves (V8043F1036, V8043F1093, V8043F1028, V8043F1101, V8043F1051). For older 4-screw models, use power head conversion kit (40003918); for newer 2-screw models, remove cover for direct mounting. 🔄Meets or Exceeds OEM Standards –Features a fully enclosed hysteresis synchronous motor （Runs Quiet, Saves Energy）, stainless steel spring return, and corrosion-resistant metal housing. Precision-engineered to ensure smooth operation with boilers, pumps, and thermostats. ✅ Automatic Operation + Manual Override – Auto-returns to normal position after power restoration. Includes an emergency manual lever for power outages (note: auxiliary switch remains inactive during manual operation). Backed by a 10 Year– We have great confidence in the quality and service life of the V8043F1036 regional valve replacement head and always provide a 10 year free replacement. For any reason you are not satisfied, you can unconditionally request a full a free replacement (without the need to return the old one). If you have any questions, please feel free to contact us at any time. We will provide you with a satisfactory response within 12 hours. 40003916-048 Replacement Head for V Series Zone Valve (V8043F106, V8043F1093, V8043F1028, V8043F1101, V8043F1051) – With End Switch ✅ Premium Replacement Part – Manufactured to strict OEM standards, ensuring seamless compatibility and long-lasting performance, just like the original. ✅ Wide Compatibility – Engineered for Honeywell V Series Zone Valves (including V8043F106, V8043F1093, V8043F1028, V8043F1101, V8043F1051), making it ideal for replacements or upgrades. ✅ Durable Construction – Handles up to 20 PSI water pressure and withstands 200°F (93°C) max temperature, suitable for both chilled and hot water systems in HVAC applications. ✅ Easy Installation – Features a 3/4" sweat connection and comes with a terminal board for quick 2-wire control wiring, reducing setup complexity. ✅ End Switch Included – Provides an electrical signal when the valve opens/closes, allowing your HVAC system to monitor water flow status efficiently. ✅ Normally Closed (NC) Operation – Stays closed by default (no power), preventing leaks; when the thermostat sends a 24Vac signal, the valve opens to allow chilled/hot water into the fan coil unit for precise room temperature control. ✅ Smart Temperature Regulation – Once the room reaches the set temperature, the thermostat cuts power, and the internal spring automatically closes the valve, stopping water flow. Reopens when cooling/heating is needed again. 📦 Package Includes: ✔ 1 Replacement Valve Head ✔ 4 Mounting Screws (OEM-compatible) ✔ Instruction Guide (verify your original model before purchase) ⚠ Pro Tip: Always turn off power and water supply before installation to avoid damage.