ICP Furnace Control Board Kit for RGS120HECB0AAA — OEM Replacement | Ships Today

Overview

The ICP OEM control board kit (part number 1183618) is the brain of your gas furnace. It manages the entire heating sequence — reading the thermostat call, sequencing the inducer, energizing the hot surface igniter, opening the gas valve, monitoring flame sense and safety limits, and timing the blower on and off. A failed board can leave the furnace completely dead, stuck in lockout, or short-cycling. Because the board interfaces with nearly every component, intermittent faults (no ignition, blower won't start, random shutdowns, flashing diagnostic LED codes) frequently trace back to a failing control board. This OEM kit restores correct factory sequencing and includes the mounting hardware needed for a clean swap.

Specifications

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil RGS120HECB0AAA gas furnace and related ICP-family units that specify board kit 1183618. Verify the original board part number and connector layout before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the furnace control/blower compartment panel.
3. Document — Photograph every connector and wire location on the existing board.
4. Remove — Unplug all harnesses one at a time and unscrew the old board from its standoffs.
5. Install — Mount the new board and reconnect each harness exactly per your photo; match any DIP/jumper settings.
6. Test — Restore power, run a full heat cycle, and confirm proper ignition, flame sense, and blower timing.

Signs You Need a Replacement

• Furnace completely unresponsive to thermostat calls.
• Diagnostic LED flashing a control/hardware fault code.
• Random short-cycling or no blower operation.
• Burnt smell, scorch marks, or visible damage on the board.

Shipping & Returns

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