ICP Furnace Control Board Kit for RGS120HRAB0AAA — Integrated Ignition | Ships Today

Overview

This OEM control board kit (OEM 1183618) for the ICP/Heil/Tempstar RGS120HRAB0AAA gas furnace is the integrated furnace control (IFC) that sequences the entire heating and cooling cycle — energizing the inducer, igniter, and gas valve in order, monitoring flame sense and limit safeties, and timing the blower on and off. It interprets 24V thermostat calls and switches the line-voltage blower and inducer relays. When the board fails from a power surge, failed relay, or burned trace, the furnace may show no response, erratic cycling, blower-only operation, or repeated flashing fault codes. This kit includes the board and mounting provisions for a direct factory-correct replacement.

Specifications

Compatibility

Designed for the ICP RGS120HRAB0AAA 120,000 BTU gas furnace and related Heil, Tempstar, and Comfortmaker units that use this integrated furnace control. Match the 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 blower compartment service panel.
3. Document — Photograph every connector, plug, and wire position on the old board.
4. Remove — Unplug all harnesses and remove the mounting screws/standoffs holding the old board.
5. Install — Mount the new board and transfer each connector to its matching terminal per your photos.
6. Test — Restore power and run a full heat cycle, confirming proper ignition sequence, flame proving, and blower operation with no fault codes.

Signs You Need a Replacement

• Furnace completely unresponsive to thermostat calls
• Repeated or flashing diagnostic fault codes
• Blower runs continuously or won't start
• Visible burned traces, scorched relays, or a blown onboard fuse

Shipping & Returns

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