ICP Integrated Furnace Control Board Kit for RGS120HRAA0AAA — OEM 1183618 | Ships Today

Overview

This is a genuine OEM integrated furnace control board kit (part number 1183618) for the ICP RGS120HRAA0AAA gas furnace, also sold under the Heil, Tempstar, and Comfortmaker brands. The control board is the brain of the furnace — it sequences the ignition, monitors the flame sensor and limit switches, energizes the gas valve and inducer, and controls blower timing on a 24-volt control circuit. When it fails, the furnace will not respond to a thermostat call for heat, will short-cycle, or will lock out on diagnostic fault codes. Replacing a failed board with this exact OEM kit restores reliable, factory-spec operation.

Specifications

Compatibility

Engineered as a direct-fit replacement for the ICP RGS120HRAA0AAA gas furnace and the equivalent Heil, Tempstar, and Comfortmaker models that share this platform. Always confirm your existing board's part number against 1183618 before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then 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 existing board before disconnecting anything.
4. Remove — Unplug the wiring harnesses, remove the mounting screws, and lift out the old control board.
5. Install — Mount the new board, reconnect each harness exactly per your photos, and seat all connectors fully.
6. Test — Restore power, initiate a call for heat, and confirm a complete ignition and blower sequence with no fault codes.

Signs You Need a Replacement

• Furnace does not respond to a thermostat heat call
• Blinking diagnostic LED / lockout fault codes
• Short-cycling or failure to complete the ignition sequence
• Inducer or blower not energizing on demand

Shipping & Returns

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