As a direct-fit HVAC blower assembly

The Watts 0386423 (Series B1156F) is a high-capacity boiler feed water pressure regulator engineered for demanding hydronic heating applications

Dual-Function Monitoring: Combines duct humidity and temperature sensing into a single probe

Flexible Sensing: Supports both local and remote flame sensing configurations to match existing equipment geometry

Common Questions for HVAC Contractors

Carrier P201-3403 Transformer 318973-401 As a direct-fit HVAC blowerThe Carrier P201 3403 Transformer is a heavy duty 40VA HVAC control transformer engineered for precision power conversion in residential and commercial climate systems. As a multi tap Totaline OEM replacement part, this component features a versatile primary winding capable of handling 120V, 208V, or 240V AC inputs, stepping down to a stable 24V AC secondary output. This Carrier multi tap transformer is specifically designed to energize low voltage