Resideo V8043A1311 Valve 319847-401 the entire Aprilaire 4277 assembly

the entire Aprilaire 4277 assembly should be replaced

the VAK08AG features corrosion-resistant coated coils and a textured aluminum cabinet secured with stainless steel screws to prevent rust streaks

preventing debris ingress and structural vibration during high-velocity operation

maintaining the integrity of the original factory wiring harness

easily accessible 3AG inline fuse and fully insulated terminal strips

Resideo V8043A1311 Valve 319847-401 the entire Aprilaire 4277 assemblyThe Resideo V8043A1311 is a high performance 24V motorized zone valve designed for precise flow control in closed loop hydronic heating systems. Featuring 1 2" press connections, this normally closed zone valve integrates seamlessly with Viega, Apollo, and Nibco press tools, significantly reducing installation time compared to traditional sweat fittings. Engineered for reliability, the low voltage zone valve utilizes a manual opener for convenient