ICP Furnace Control Board Kit for RGS120HDAA0AAA — OEM 1183618 | Ships Today

Overview

This genuine OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS120HDAA0AAA gas furnace. The board is the brain of the furnace — it sequences the inducer, igniter, gas valve, and blower, monitors safety circuits, and reads the thermostat call. When the board fails you may see no response to the thermostat, blinking diagnostic LED fault codes, blower or inducer that won't run, or random lockouts. The kit ships with the mounting hardware and instructions needed for a clean replacement.

Specifications

Compatibility

Built for the ICP Tempstar Heil RGS120HDAA0AAA and platform models specifying control board kit 1183618. Match the board layout, connector locations, and part number to your existing unit before installing.

Installation Guide

1. Safety First — Disconnect gas and electrical power; verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment panel.
3. Document — Photograph every wire and connector position on the old board before removing anything.
4. Remove — Unplug each harness, remove the mounting screws, and lift out the failed board.
5. Install — Mount the new board, transfer connectors to identical positions per your photos, and verify any dip-switch/jumper settings match.
6. Test — Restore power and gas, run a full heat cycle, and confirm normal sequencing with no fault codes.

Signs You Need a Replacement

• Furnace does not respond to the thermostat
• Diagnostic LED shows a board/control fault code
• Inducer, igniter, or blower will not energize in sequence
• Random lockouts or short-cycling with no other failed component

Shipping & Returns

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