ICP Furnace Control Board Kit for RGS120HFCB0AAA — 1183618 Integrated Ignition Board | Ships Today

Overview

This OEM integrated furnace control board kit (part 1183618) is the brain of the ICP / Tempstar / Heil RGS120HFCB0AAA gas furnace. It sequences the ignition system, manages the inducer and blower relays, monitors safety limits and flame sense, and runs the diagnostic LED fault codes. A failed board typically shows up as a dead furnace, blower or inducer that won't start or won't stop, erratic LED codes, or ignition that never initiates even though the igniter and gas valve test good. The kit ships with the mounting and connector hardware needed for a direct replacement.

Specifications

Compatibility

Designed for the RGS120HFCB0AAA and shared ICP-platform furnaces marketed under Tempstar, Heil, Comfortmaker, and Arcoaire. Verify the board's OEM number against your existing board, as ICP uses several revisions across the platform.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the blower-compartment service panel.
3. Document — Photograph every wire and connector position on the existing board before unplugging anything.
4. Remove — Unplug all harnesses, remove the board mounting screws, and lift the old board out.
5. Install — Mount the new board, transfer connectors one at a time, and reconnect exactly per your photos.
6. Test — Restore power, run a full heat cycle, and confirm the LED shows a normal (no-fault) status.

Signs You Need a Replacement

• Furnace completely unresponsive to thermostat calls
• Inducer or blower runs continuously or never engages
• Erratic or no LED diagnostic code
• No ignition sequence despite a good igniter, valve, and flame sensor

Shipping & Returns

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