White-Rodgers 50T35-743 Control

The White-Rodgers 50T35-743 Control is a dedicated silicon carbide integrated furnace control designed for single-stage heating systems using hot surface ignition (HSI). Built as a direct-fit OEM replacement for select Goodman, UTEC, and Texas Instruments modules, this board manages the gas valve, ignitor, single or two-speed blower motor, and inducer. It operates on a 25 VAC input and features a 3-amp fuse to protect the low voltage system transformer against shorts. The 50T35-743 includes diagnostic flash codes for rapid furnace troubleshooting and supports twinning applications. With a robust operating temperature range from -40°F to 175°F, it ensures reliable performance in diverse mechanical environments. Technicians should note its 15-second pre-purge timing and adjustable blower-off delays, making it a critical component for restoring PSC blower motor and 120V HSI ignition sequences in compatible HVACR units.

• Direct Cross-Reference Compatibility: Specifically engineered to replace Goodman B18099-13, UTEC 1012-933D, and TI 41F-5 without complex rewiring.
• System Protection: Integrated 3-amp replacable fuse guards the 24V furnace control circuit and transformer from electrical faults.
• Advanced Diagnostics: On-board LED provides diagnostic flash codes to identify flame failure, pressure switch stuck open, or limit circuit issues.
• Flexible Configuration: Supports 90+ furnace applications and provides twinning capabilities for dual-furnace setups.
• Optimized Ignition: Precise timing for silicon carbide ignitors ensures consistent burner lighting and efficient fuel combustion.

What is the primary ignition source for the 50T35-743?
This control is designed for 120V Silicon Carbide Hot Surface Ignitors. It is not compatible with Silicon Nitride ignitors or direct spark ignition systems.

Can I use this board for a two-stage furnace?
No, the White-Rodgers 50T35-743 is strictly for single-stage integrated furnace applications. For two-stage systems, consult the manufacturer's cross-reference guide for a compatible 50M series control.

How do I troubleshoot a "no heat" call using this board?
Observe the status LED. Common codes include 1 flash (flame sensed without gas valve energized), 2 flashes (pressure switch stuck closed), and 3 flashes (pressure switch stuck open). Always verify the 3-amp fuse is intact before replacing the integrated furnace control.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.