Resideo S87D1004 Ignition Module 30067439-890 Technicians often identify a failing

Technicians often identify a failing S1-031-03002-000 by observing erratic fan behavior

the A-4000-1049 is the direct engineering replacement for the discontinued A-4000-149 filter

though it is rated for multi-positional use in some configurations

This OEM-spec part ensures exact fitment and electronic air cleaner maintenance compliance

this specific head is designed only for normally open V4043B series valves

Resideo S87D1004 Ignition Module 30067439-890 Technicians often identify a failingThe Resideo S87D1004 Ignition Module provides reliable solid state control for 24VAC gas fired equipment, including furnaces, boilers, and commercial heating appliances. Engineered for direct spark ignition (DSI), this module features a two rod flame sense configuration, utilizing separate electrodes for spark ignition and flame rectification to ensure precise local sensing. With no prepurge required, the ignition sequence is immediate, initiating an