potentially causing the limit switch to trip

check for a cracked ceramic insulator on the pilot assembly or a clogged pilot orifice

the internal contacts may be damaged

Direct OEM Compatibility: Engineered as an authentic HVAC circuit board to match original factory specifications for easy field installation

and R-134A applications

Lennox Y4749 Replacement Mod 321894-708 potentially causing the limit switchThe Lennox Y4749 serves as the primary Pulse Furnace Replacement Mod, specifically engineered to replace the legacy G891TCA series direct spark ignition controls. This Baso BGN891 2C module is a critical 24V component for maintaining the unique combustion cycle of the Lennox Pulse furnace, providing precise timing for pre purge, trial for ignition, and inter purge sequences. As a veteran grade furnace ignition control board, it is designed for a wire