WHITE-RODGERS 50A55-843 UNIVERSAL INTEGRATED FAN CONTROL

Description:

The WHITE-RODGERS 50A55-843 Universal Integrated Fan Control is used in residential and commercial gas-fired HVAC systems for managing ignition sequencing, blower motor timing, inducer operation, and furnace safety monitoring. Commonly installed in gas furnaces, rooftop HVAC units, and forced-air heating systems. Maintenance teams, HVAC technicians, and OEM manufacturers use this part for furnace control board replacement, heating system repair, retrofit projects, and restoration of ignition and blower control functionality. The module is designed as a universal replacement integrated furnace control board for many OEM systems.

Applications:

The WHITE-RODGERS 50A55-843 integrated fan control is commonly used in HVAC environments requiring reliable ignition control, blower timing management, and furnace safety diagnostics. It is frequently installed in residential and commercial gas furnaces, air handling systems, and packaged heating units where dependable flame sensing, inducer sequencing, and blower relay timing are critical for maintaining heating efficiency and safe furnace operation. The module supports silicon carbide ignition systems and replaces numerous OEM integrated ignition boards.

Technical Specifications:

• Brand: WHITE-RODGERS
• Part Number: 50A55-843
• Product Type: Universal Integrated Fan Control
• Control Voltage: 24/25 VAC
• Frequency Rating: 50/60 Hz
• Board Type: Integrated Furnace Control Board
• Ignition Type: Silicon Carbide Ignition
• Application: Furnace Ignition and Blower Control
• Compatible Equipment: Gas Furnaces and HVAC Systems
• Fuel Compatibility: Natural Gas and LP Gas
• Valve Relay Rating: 1.5 A
• Ignitor Relay Rating: 6.0 A at 120 VAC
• Inducer Relay Rating: 2.2 FLA / 3.5 LRA
• Circulator Relay Rating: 14.5 FLA / 25 LRA
• Pre-Purge Time: 30 Seconds
• Lockout Time: 5 Minutes
• Igniter Warm-Up Time: 17 Seconds
• Features: Diagnostic LED Flash Codes and Adjustable Blower Relay
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°F to 175°F
• Replacement Type: Universal OEM Replacement Control Board

Common Replacements:

• Emerson 50A55-3797 Integrated Furnace Control
• Honeywell S9200U1000 Furnace Control Board
• ICM Controls ICM280 Furnace Control Board