White-Rodgers 50A66-743 Furnace Control Board

The White-Rodgers 50A66-743 furnace control board is a reliable, one-stage integrated control designed for modern residential furnaces. This CSA-certified furnace control board features integrated flame sense, hot surface ignition, and a 4-trial ignition sequence for dependable startup and efficient operation.

Engineered for durability in variable climates, it supports a 25 VAC input, surface mounting, and a wide operating range, making it a practical replacement or upgrade for compatible furnaces.

• Type: 1-Stage Integrated
• Flame sense: Integrated
• Ignition source: Hot Surface
• Ignition sequence: 4-Trial
• Prepurge time: 15 seconds
• Voltage and frequency: 25 VAC @ 50/60 Hz
• Valve relay: 1.5 A @ 25 VAC, 0.6 pF
• Inducer relay: 2.2 FLA / 3.5 LRA @ 120 VAC
• Circulator relay: 14.5 FLA / 25 LRA @ 120 VAC
• Temperature range: -40 to 175°F
• Humidity range: 5–93% RH
• Mounting: Surface Mount
• Standards: CSA (Canada & US)
• Application: Furnace