50M56U-843 furnace control board replacement

The White-Rodgers 50M56U-843 furnace control board's official cross-reference replacements are ICM Controls ICM2812 and 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 boards

ICM Controls ICM2812 Source: ICM Controls Cross Reference Guide (LIAF309-2)
Link coming soon
ICM Controls ICM2812-KIT Source: ICM Controls Cross Reference Guide (LIAF309-2)
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 50M56U-843 exactly.
Note the furnace model number from its rating plate; the installing technician will need it.

Questions about this board

What replaces the 50M56U-843 furnace control board?

White-Rodgers 50M56U-843 cross-references to ICM Controls ICM2812 and ICM Controls ICM2812-KIT, according to the ICM Controls Cross Reference Guide (LIAF309-2).

Which 50M56U-843 replacement should I buy?

Each listed board is an official cross for 50M56U-843 in its manufacturer's own cross-reference. Ask the technician who will install it which one suits your furnace before ordering.

Can I replace the 50M56U-843 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.

50A50-110 50A50-111 50A50-112 50A50-113 50A50-130 50A50-131 50A50-142 50A50-143 50A50-205 50A50-206 50A50-207 50A50-208

VERIFY THE SOURCE

Sources for this page

ICM Controls Cross Reference Guide (LIAF309-2) Furnace Control Boards section · retrieved 2026-07-19