ICP Furnace Control Board Kit for RGS120HRCA0AAA — Integrated Ignition Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS120HRCA0AAA gas furnace. The board is the brain of the furnace: it sequences the inducer, igniter, gas valve, and blower, monitors safety limits and flame, and manages thermostat calls for heat, cool, and continuous fan. When a control board fails — often from heat stress, surges, cracked solder joints, or a failed relay — the furnace may behave erratically or stop responding entirely. The kit ships with the mounting hardware and instructions needed for a clean swap on this furnace platform.

Specifications

Compatibility

Direct fit for the ICP, Tempstar, Heil, Comfortmaker, and Arcoaire RGS120HRCA0AAA gas furnace and related RGS-series models that use this control kit. Verify the existing board part number and connector layout before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; 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 old board before disconnecting anything.
4. Remove — Unplug the harnesses one at a time, remove the mounting screws, and lift out the failed board.
5. Install — Mount the new board with the supplied hardware and reconnect each harness exactly per your photos.
6. Test — Restore power, run heat, cool, and fan cycles, and confirm correct sequencing and no fault codes on the diagnostic LED.

Signs You Need a Replacement

• Furnace completely unresponsive to thermostat calls
• Blower or inducer runs constantly or not at all
• Intermittent operation or random lockouts
• Diagnostic LED dark or flashing a hard-fault code

Shipping & Returns

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