X445901 furnace control board replacement

The Lennox X445901 furnace control board's official cross-reference replacement is ICM Controls ICM2812-KIT.

Furnace control boards switch 120/240V line voltage and the gas valve. This page is for identifying the correct replacement part only — it is not a wiring or installation guide. Improper installation can cause fire, electrical shock, or gas hazards; have a licensed HVAC technician do the actual replacement.

Replacement board

ICM Controls ICM2812-KIT Uses adapter harness 6 from the kitSource: ICM Controls ICM2812-KIT Cross Reference (LIAF321)
Link coming soon

Board type: Integrated furnace control board

Before you order

Read the part number stamped or printed on the board itself, including any suffix letter. It must match X445901 exactly.
Note the furnace model number from its rating plate; the installing technician will need it.

Questions about this board

What replaces the X445901 furnace control board?

Lennox X445901 cross-references to ICM Controls ICM2812-KIT, according to the ICM Controls ICM2812-KIT Cross Reference (LIAF321).

Why does the ICM2812-KIT need adapter harnesses for X445901?

The ICM2812-KIT is one universal board for 200+ OEM part numbers. ICM's sheet assigns each part number the harness(es) from the kit that adapt it to that furnace; for X445901 that is adapter harness 6.

Can I replace the X445901 board myself?

FitXref only identifies the part. A furnace control board switches line voltage and the gas valve, so a licensed HVAC technician should install it and check the furnace afterwards.

100925-01 100925-02 100925-03 10M93 10M9301 1214201 12L6901 17W92 17W9201 23W51 23W5101 30W25

VERIFY THE SOURCE

Sources for this page

ICM Controls ICM2812-KIT Cross Reference (LIAF321) Part number and adapter harness table · retrieved 2026-11-04