ICP Furnace Control Board for RGS120LRCA0AAA — 24V Integrated Control Kit | Ships Today

Overview

This OEM ICP integrated furnace control board (PN 1183618, KIT CONTROL BOARD) is the brain of your RGS120LRCA0AAA gas furnace. It manages the ignition sequence, blower timing, gas valve operation, safety lockouts, and diagnostic fault codes. Operating on a 24V control circuit, it coordinates the thermostat call, inducer, igniter, and flame sensing to deliver safe, reliable heat. A failed control board is one of the most common causes of a furnace that won't ignite, short-cycles, runs the blower continuously, or flashes diagnostic error codes. Replacing it with a genuine OEM kit restores correct timing and full diagnostic capability.

Specifications

Compatibility

Designed as a direct OEM replacement for the ICP RGS120LRCA0AAA gas furnace and shared platform models across the Tempstar, Heil, and Comfortmaker families that originally used part 1183618. Always verify your existing board's part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control/blower compartment service panel.
3. Document — Photograph every wire and connector on the existing board before disconnecting.
4. Remove — Label and unplug each harness, release the board mounting screws/standoffs, and lift out the old board.
5. Install — Mount the new board, then reconnect every harness exactly per your photos.
6. Test — Restore power, initiate a heat call, and confirm a full ignition sequence with no fault codes.

Signs You Need a Replacement

• Furnace will not ignite or has no response to a thermostat call
• Blower runs continuously or fails to start
• Repeated short-cycling or random lockouts
• Diagnostic LED flashing error/fault codes or no LED at all

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.