ICP Furnace Control Board Kit for RGS120HSAB0AAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part number 1183618) is the brain of the ICP Tempstar Heil RGS120HSAB0AAA gas furnace. It manages the ignition sequence, sequences the inducer and blower motors, monitors the limit and pressure switches, runs flame sensing, and handles safety lockouts. When the board fails, the furnace may not respond to a call for heat, may short-cycle, may run the blower continuously, or may lock out with a fault code on the diagnostic LED. Heat stress, voltage surges, and cracked relays or solder joints are common failure causes. The kit includes the matched board and mounting hardware for a direct replacement.

Specifications

Compatibility

Designed for the ICP Tempstar Heil RGS120HSAB0AAA and related RGS-series furnaces using this integrated control. Confirm the board layout, connector positions, and part number against your existing board before installing.

Installation Guide

1. Safety First — Disconnect electrical power and gas, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment panel.
3. Document — Photograph every wire harness and connector on the existing board before removing anything.
4. Remove — Unplug each connector, release the board from its standoffs, and lift it out.
5. Install — Mount the new board on the standoffs and reconnect every harness to the matching connector per your photo.
6. Test — Restore power and gas, run a full heat cycle, and confirm ignition, blower timing, and the diagnostic LED show normal operation.

Signs You Need a Replacement

• No response to a call for heat
• Furnace short-cycles or blower runs nonstop
• Diagnostic LED shows a control or lockout fault
• Burned spots, cracked relays, or scorched connectors on the board

Shipping & Returns

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