ICP Furnace Control Board for RGS303SRAA0AAAA — OEM Kit 1183618 | Ships Today

Overview

This is a genuine OEM control board kit (part number 1183618) for the ICP Tempstar Heil RGS303SRAA0AAAA gas furnace. The integrated furnace control board is the brain of the system, managing the ignition sequence, inducer and blower timing, safety interlocks, and diagnostic fault codes. When the board fails the furnace may be completely dead, fail to start the inducer or blower, flash error codes, or behave erratically. Because the board coordinates every safety and timing function, a failed board cannot be safely worked around — replacement restores correct, code-compliant operation. This kit is a direct OEM replacement.

Specifications

Compatibility

Built for the ICP family RGS303SRAA0AAAA furnace and shared across compatible Tempstar, Heil, Comfortmaker, Arcoaire, and KeepRite models using this control board kit. Always match the board part number and connector layout against your original before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control panel cover.
3. Document — Photograph every connector and wire harness location on the old board before disconnecting.
4. Remove — Unplug each harness, release the board standoffs or screws, and lift out the old board.
5. Install — Mount the new board and reconnect every harness exactly per your photo and the wiring diagram.
6. Test — Restore power, run a full heat cycle, and confirm correct ignition, blower timing, and no fault codes.

Signs You Need a Replacement

• Furnace completely unresponsive with power confirmed
• Inducer or blower will not start despite a call for heat
• Erratic operation or persistent diagnostic fault codes
• Visible burn marks, corrosion, or damaged components on the board

Shipping & Returns

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