ICP Control Board Kit for RGS303HFAA0AAAA — OEM 1183618 Furnace Control Board | Ships Today

Overview

This is the genuine OEM control board kit (part number 1183618) for the ICP Tempstar Heil RGS303HFAA0AAAA furnace. The integrated furnace control board is the brain of the system — it sequences ignition, manages the inducer and blower, monitors safety limits and flame, and processes the thermostat signal. When the board fails you may see no response to a heat call, blower or inducer that won't run, erratic short-cycling, or fault codes flashed on the diagnostic LED. The 1183618 kit ships with the matching board and mounting hardware so you can restore full furnace operation with an exact OEM replacement.

Specifications

Compatibility

Direct OEM replacement for the ICP Tempstar Heil RGS303HFAA0AAAA furnace and related RGS-series units that specify the 1183618 control board kit. Confirm your existing board part number and connector layout before ordering.

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 control-compartment service panel.
3. Document — Photograph every connector and wire harness on the old board before unplugging anything.
4. Remove — Unplug each harness, remove the board mounting screws, and lift out the failed board.
5. Install — Mount the new board from the kit, transfer any jumpers/settings, and reconnect each harness per your photo.
6. Test — Restore power, run a full heat cycle, and confirm ignition, inducer, blower, and diagnostic LED operate normally.

Signs You Need a Replacement

• No response from the furnace on a thermostat heat call.
• Inducer or blower motor will not energize.
• Persistent fault codes or a dead diagnostic LED.
• Erratic short-cycling or random shutdowns not traced to other components.

Shipping & Returns

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