ICP Furnace Control Board Kit for RGS120LRBB0AAA | Ships Today

Overview

This OEM control board kit (part #1183618) is the integrated furnace control (IFC) for the ICP / Heil / Tempstar RGS120LRBB0AAA gas furnace. The control board is the brain of the furnace: it sequences the inducer, igniter, gas valve, and blower; monitors flame and the safety limit and pressure switches; and manages ignition timing and lockout protection. When it fails, the furnace may not start at all, may short-cycle, may run the blower continuously, or may flash diagnostic fault codes on its onboard LED. This kit ships with the mounting hardware and instructions needed for a direct OEM replacement.

Specifications

Compatibility

Designed for the ICP/Heil/Tempstar RGS120LRBB0AAA and related furnaces across the International Comfort Products family (Heil, Tempstar, Comfortmaker, Arcoaire). Verify the existing board's part number and connector layout before ordering.

Installation Guide

1. Safety First – Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
2. Access – Remove the blower compartment service panel.
3. Document – Photograph every wire harness and terminal position before disconnecting anything.
4. Remove – Unplug all connectors, remove the mounting screws/standoffs, and take out the old board.
5. Install – Mount the new board with the included hardware and reconnect each harness exactly per your photos.
6. Test – Restore power, run a full heat cycle, and confirm the diagnostic LED shows normal operation with no fault codes.

Signs You Need a Replacement

• Furnace completely unresponsive to a call for heat
• Blower runs constantly or won't start
• Diagnostic LED flashing a hard fault/lockout code
• Intermittent ignition or random short-cycling

Shipping & Returns

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