ICP Control Board for RGS120SFAA0AAA — Integrated Furnace Ignition Control | Ships Today

Overview

The OEM control board kit (part number 1183618) is the electronic brain of your ICP RGS120SFAA0AAA gas furnace. It manages the entire heating sequence — call for heat, inducer start, hot surface igniter timing, gas valve energizing, flame sensing, and blower on/off delays — while continuously monitoring safety limits and pressure switches. When this board fails, the furnace may fail to ignite, short-cycle, lock out after a few attempts, run the blower continuously, or flash a diagnostic fault code. A board that is cracked, has burnt traces, blown relays, or corroded connectors should be replaced rather than repaired.

Specifications

Compatibility

Engineered as a direct OEM replacement for the ICP RGS120SFAA0AAA gas furnace and other compatible models across the ICP family of brands (Heil, Tempstar, Comfortmaker). Always match your existing board part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the furnace blower-compartment service panel.
3. Document — Photograph every wire and connector position on the old board before disconnecting anything.
4. Remove — Unplug all harness connectors, remove the mounting screws/standoffs, and lift out the failed board.
5. Install — Mount the new board, then reconnect every harness exactly as photographed.
6. Test — Restore power, initiate a call for heat, and confirm a full ignition cycle with proper blower operation.

Signs You Need a Replacement

• Furnace will not ignite or repeatedly locks out
• Diagnostic LED flashing an error / no LED at all
• Blower runs constantly or never engages
• Visible burnt spots, cracked traces, or failed relays on the board

Shipping & Returns

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