White-rodgers 50m61-843 Two-stage Ignition Control Module

Product Description

The WHITE-RODGERS 50m61-843 is a universal integrated two-stage ignition control module designed for gas furnace applications. It manages burner sequencing, flame supervision, and ignition timing for two-stage heating systems using silicon nitride ignition technology. Silicon nitride igniters run cooler than traditional hot-surface igniters and resist thermal shock, which reduces nuisance failures in demanding duty cycles. This module is installed by licensed HVAC technicians as part of a furnace control upgrade or direct replacement of a failed ignition control board.

The 50m61-843 is suited for residential and light commercial gas furnace installations where two-stage heating control is required. Its universal design allows it to fit a broad range of furnace configurations without requiring a custom OEM board. Technicians working on two-stage gas furnaces will find this module applicable in retrofit and service-replacement scenarios where the original control board is discontinued or unavailable.

Key Features

• Universal fit design supports two-stage gas furnace control without model-specific programming
• Integrates ignition control, flame sensing, and burner sequencing in a single module
• Compatible with silicon nitride ignition systems for improved igniter durability and longevity
• Two-stage operation supports variable heat output for improved efficiency and comfort control
• Drop-in replacement format simplifies service calls and reduces truck-stock complexity

Compatibility

Designed as a universal OEM-style replacement integrated control module for two-stage residential and light commercial gas furnaces equipped with nitride ignition systems. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation must be performed by a qualified HVAC technician in accordance with applicable local codes and the furnace manufacturer guidelines. Disconnect power to the furnace at the disconnect switch and shut off the gas supply before removing the existing control board. Label all wiring before disconnecting from the original module to ensure correct reconnection. Verify that the replacement module settings match the original furnace staging and ignition timing requirements before returning the system to service.

Technical Specifications

• Ignition Type: Silicon Nitride Hot Surface Ignition
• Control Stages: Two-Stage
• Module Type: Universal Integrated Ignition Control
• UPC: 786710521904

Standard Information

• Brand: WHITE-RODGERS
• Manufacturer Part Number: 50m61-843