White-Rodgers 50A55-3797 Hot Surface Furnace Control Kit

The White-Rodgers 50A55-3797 Hot Surface Furnace Control Kit is a reliable, integrated Type 1-Stage control designed for modern furnaces. This hot surface ignition kit delivers safe, efficient start-up for natural gas and LP-fired systems with a 3-trial ignition sequence and a 2-second flame failure response.

Engineered for durability, the control operates at 25V AC with a 1.5 Amp valve rating and fits compactly at 4.4" W x 1.25" D x 5.9" H. It supports a wide temperature range from -40 to 175°F and carries CSA approval for North American installations. The kit includes powerful diagnostic features and robust relay ratings for igniter, inducer, and circulator relays, ensuring reliable ignition and safe shut-down when needed.

• Type: 1-Stage, integrated hot surface control
• Ignition: Hot surface ignition with 3-trial activation, 3-second ignition activation period
• Sequence timing: Prepurge 0s, Ignition 3s, Valve 12s, Interpurge 60s, Post-purge 5s, Lockout 300s, Auto reset 60 minutes
• Flame safety: Flame failure response within 2 seconds
• Electrical: Valve 1.5A @ 25V AC; Igniter relay 6A @ 120V AC; Inducer 2.2A FLA / 3.5A LRA; Circulator 14.5A FLA / 25A LRA
• Environment: 5–93% humidity, non-condensing
• Diagnostics: Includes Flash Code Diagnostic

Ideal for residential furnaces requiring an integrated hot surface control with clear diagnostics and dependable safety performance.