ICP Furnace Control Board Kit for RGS303HRFA0AAAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS303HRFA0AAAA gas furnace. The board manages the entire heating sequence — igniter timing, gas valve activation, blower control, flame sensing, and safety lockouts. When the control board fails you may see no response to a thermostat call, blower running continuously, flashing diagnostic LED fault codes, or random shutdowns mid-cycle. Because the board ties every furnace function together, a failed control is a no-heat emergency that the kit resolves with a direct OEM replacement.

Specifications

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil RGS303HRFA0AAAA gas furnace and parts-compatible RGS-series units sharing the same control platform. Verify your model and serial number, and match any existing jumper/DIP configuration before installing.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace blower-compartment service panel.
3. Document — Photograph every wire and connector on the existing board before disconnecting.
4. Remove — Unplug all harnesses, remove the mounting screws, and lift out the failed control board.
5. Install — Mount the new board, transfer any jumpers/DIP settings, and reconnect each harness exactly per your photos.
6. Test — Restore power, run a full heat cycle, and confirm correct ignition, blower, and LED status with no fault codes.

Signs You Need a Replacement

• No furnace response to a thermostat heat call.
• Persistent or unfamiliar flashing LED fault codes.
• Blower runs continuously or fails to start.
• Random mid-cycle shutdowns or repeated lockouts.

Shipping & Returns

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