ICP Furnace Control Board Kit for RGS303LEEA0AAAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part #1183618) is the integrated furnace control (IFC) for the ICP/Tempstar/Heil RGS303LEEA0AAAA gas furnace. The board is the brain of the furnace — it sequences the ignition cycle, manages the inducer and blower motors, monitors safety switches and flame sense, and communicates with the thermostat. When the board fails, the furnace may show no response to a heat call, blower-only operation, short cycling, repeated lockouts, or erratic diagnostic LED flash codes. This kit ships with the mounting hardware and instructions needed for a clean replacement.

Specifications

Compatibility

Direct OEM replacement kit for the ICP/Tempstar/Heil RGS303LEEA0AAAA gas furnace and other ICP-family models specifying part 1183618. Verify your existing board's part number and connector layout before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker and verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment service panel.
3. Document — Photograph every wire and connector on the old board before disconnecting anything.
4. Remove — Unplug all harnesses, remove the mounting screws, and lift out the failed board.
5. Install — Mount the new board, then transfer each connector to its matching terminal exactly as photographed.
6. Test — Restore power, run a full heat cycle, and confirm normal ignition, blower operation, and a steady diagnostic LED.

Signs You Need a Replacement

• No furnace response to a thermostat heat call
• Blower runs continuously or fails to start
• Repeated ignition lockouts or short cycling
• Erratic or fault-coded diagnostic LED flashes

Shipping & Returns

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