When installing the S1-FHM3589

Dual Application: Engineered for use in both heat pump and air conditioning evaporator coils

it is vital to verify the specific blower housing dimensions

or the furnace short-cycling without a thermostat command change

Laars Heating Systems E2305400 Module mario When installing the S1-FHM3589The Laars Heating Systems E2305400 Intermittent Pilot Ignition Module is a critical 24V electronic control designed for high performance gas fired boilers and water heaters. Engineered for precise HVAC burner sequencing, this IP ignition module features a 5 second Trial for Ignition (TFI) period and a single try ignition sequence to ensure safe and efficient combustion. It serves as a direct replacement for various Laars boiler control modules,