Direct compatibility with Johnson Controls A-4000 series stations for seamless maintenance

Proper seating in the rear locating slots is essential

condensate will back up and potentially overflow into the combustion air intake or heat exchanger

Key Benefits Engineered for UDAP and UDAS Systems: Specifically sized for Reznor unit heaters to ensure seamless integration during LP conversion

Intelligent Logic: Employs first-call priority with a 20-minute time-share override to prevent "zone-robbing" and ensure all areas reach setpoint efficiently

Laars Heating Systems E2311900 Ignition Control 322056-301 Direct compatibility with Johnson ControlsThe Laars Heating Systems E2311900 Ignition Control is a critical OEM replacement part designed for high performance residential and commercial hydronic applications. This electronic ignition module manages the complete sequence of operation, including pre purge timings, trial for ignition, and integrated flame sensing. Engineered to replace faulty controls in Laars Pennant boilers and Mighty Therm volume water heaters, this module ensures precise