LH33WP003A furnace control board replacement

The Carrier LH33WP003A furnace control board's official cross-reference replacement is ICM Controls ICM291.

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 ICM291 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 LH33WP003A exactly.
Note the furnace model number from its rating plate; the installing technician will need it.

Questions about this board

What replaces the LH33WP003A furnace control board?

Carrier LH33WP003A cross-references to ICM Controls ICM291, according to the ICM Controls Cross Reference Guide (LIAF309-2).

Can I replace the LH33WP003A 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.

LH33WP003 1171166

VERIFY THE SOURCE

Sources for this page

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