ICP Furnace Control Board Kit for RGS120HRBA0AAA — OEM 1183618 | Ships Today

Overview

This genuine OEM furnace control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP/Tempstar/Heil RGS120HRBA0AAA gas furnace. The control board is the brain of the furnace: it sequences the inducer motor, igniter, gas valve, and blower, monitors safety devices like the pressure switch and flame sensor, and manages timing for each heat cycle. It also drives the diagnostic LED used to read fault codes. When a board fails, the furnace may not respond to thermostat calls, ignite erratically, fail to run the blower, repeatedly lock out, or flash error codes. The kit ships with the mounting and connector hardware needed for a clean OEM replacement.

Specifications

Compatibility

Direct replacement control board kit for the ICP/Tempstar/Heil RGS120HRBA0AAA and platform-shared furnaces using the same IFC. Match your existing board's 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 furnace blower/control compartment door.
3. Document — Photograph every connector and wire location on the old board before unplugging.
4. Remove — Unplug each harness, remove the mounting screws/standoffs, and take out the old board.
5. Install — Mount the new 1183618 board, transfer any jumpers/links, and reconnect each harness exactly per your photos.
6. Test — Restore power, run a full heat cycle, and confirm correct sequencing with no fault codes.

Signs You Need a Replacement

• Furnace does not respond to a thermostat call for heat
• Erratic ignition, no blower, or repeated lockouts
• Diagnostic LED flashing a control/board fault code
• Burned spots, corrosion, or damaged relays on the board

Shipping & Returns

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