ICP Control Board Kit for RGS303SDAA0AAAA — OEM 1183618 | Ships Today

Overview

This genuine OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP Tempstar Heil RGS303SDAA0AAAA gas furnace. The board is the brain of the furnace: it manages the ignition sequence, inducer and blower timing, safety interlocks, and diagnostic fault codes. When the board fails you may see a furnace that is completely dead, blinking diagnostic LED fault codes, a blower that runs constantly, or ignition that never sequences. This kit ships with the matching board and mounting hardware so you can restore full, code-correct furnace operation.

Specifications

Compatibility

Engineered for the ICP Tempstar Heil RGS303SDAA0AAAA furnace and shared across ICP-family gas furnaces (Tempstar, Heil, Comfortmaker, Arcoaire) that specify control board kit 1183618. Always match the OEM kit number and connector layout to your existing board 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/blower compartment panel.
3. Document — Photograph every connector and wire harness on the old board before disconnecting.
4. Remove — Unplug each harness, note any dip-switch or jumper settings, and unscrew the old board.
5. Install — Mount the new board, replicate the original switch settings, and reconnect every harness per your photo.
6. Test — Restore power and run a full heat cycle, confirming proper sequencing and no fault codes.

Signs You Need a Replacement

• Furnace is completely unresponsive with no diagnostic LED
• Repeating blinking fault codes that point to the control
• Blower or inducer that runs continuously or never starts
• Ignition sequence that fails to initiate on a call for heat

Shipping & Returns

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