Subsequent calls for second and third-stage heat activate the heat pump compressor and auxiliary electric heat respectively

000 BTU/hr to handle high-output commercial heating equipment

allowing multiple sensors to reside on the same bus without signal collision

providing the precise safety shut-off required for professional-grade gas cooking controls

Whether you are addressing a noisy furnace blower wheel or a failed hub

Laars Heating Systems E2313900 Ignition Module 322838-754 Subsequent calls for second andThe Laars Heating Systems E2313900 Ignition Module is a critical 24V electronic ignition control engineered for precision sequence timing in natural gas boilers. Designed for professional field replacement, this module features a 3 try, 4 second trial for ignition (TFI) protocol, ensuring safe burner startup and flame rectification. As a direct OEM replacement part, it replaces obsolete and legacy controls, including part numbers 35 679920 571 and 35