White-Rodgers 50M56X-843

White-Rodgers 50M56X-843 is a universal single‑stage HSI integrated furnace control designed for PSC & ECMX blower motors. It includes a universal 120V silicon nitride ignitor and uses the White Rodgers Connect App for simple configuration and diagnostics. This control replaces 550+ models, including 50X57-843, delivering broad compatibility and streamlined service.

• Universal compatibility with PSC & ECMX blower motors for flexible retrofits
• Integrated HSI ignition with 120V silicon nitride ignitor for reliable starts
• Single-stage control for consistent furnace performance
• Smart configuration and diagnostics via the White Rodgers Connect App
• Extensive replacement options — replaces 550+ models including 50X57-843

Designed for compatibility across a broad range of furnaces, the 50M56X-843 helps technicians reduce downtime with straightforward setup and reliable ignition. It supports both PSC and ECMX blower motors and leverages a 120V silicon nitride ignitor for dependable starts in challenging environments. The integrated control with the White Rodgers Connect App enables quick diagnostics, fault codes, and parameter adjustments, making maintenance simpler and faster.