The White Rodgers 50M56U-801 is a universal hot surface ignition (HSI) furnace control kit designed for single-stage gas furnaces. It serves as a dependable replacement for a wide range of OEM control boards, including those found in Lennox systems. This all-in-one kit simplifies furnace repair or upgrade tasks by offering easy installation and broad compatibility.Key Features:
- Universal Replacement: Compatible with a wide variety of OEM boards, including Lennox, reducing the need to stock multiple parts.
- Hot Surface Ignition Control: Optimized for single-stage systems using HSI, enhancing performance and efficiency.
- Advanced Safety Functions: Includes flame sensing, ignition lockout, and combustion timing control through pre-purge and post-purge functions.
- Diagnostic LED Indicators: Built-in LEDs provide system status updates and error code identification for easier troubleshooting.
- Comprehensive Kit: Includes a universal nitride ignitor, wire harnesses, and mounting hardware for straightforward installation.
- Input Voltage: 25 VAC, 50/60 Hz
- Max Input Current: 0.45 amp @ 25 VAC
- Valve Relay: 1.5 amp @ 25 VAC, 50/60 Hz, 0.6 pf
- Ignitor Relay: 1.2 amp @ 120 VAC
- Inducer Relay: 2.8 amp @ 120 VAC
- Circulator Relay: 10.0 FLA – 25.0 LRA @ 120 VAC
- Humidifier Load: 1.0 amp @ 24 or 120 VAC
- Electronic Air Cleaner: 1.0 amp @ 120 VAC
- Flame Establishing Time: 0.8 seconds
- Flame Failure Response Time: 2.0 seconds
- Operating Temperature: -40 to 175°F
- Humidity Range: 5% to 93% RH (non-condensing)
- Mounting Style: Snap-in standoffs

