ICP Furnace Control Board Kit for RGS303HEFA0AAAA — OEM Control Board | Ships Today

Overview

This is the genuine OEM control board kit (part 1183618) for the ICP / Heil / Tempstar RGS303HEFA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it sequences the inducer, igniter, gas valve, and blower, monitors safety limits and flame sense, and manages 24V signaling from the thermostat. When the board fails, the furnace may not respond to a heat call, lock out on diagnostics, fail to energize the blower, or throw repeated error codes. This complete kit includes the OEM-matched board for correct firmware, terminal layout, and timing on this furnace platform.

Specifications

Compatibility

Direct OEM replacement for the ICP-family RGS303HEFA0AAAA furnace and related Heil, Tempstar, and Comfortmaker models using the same control platform. Confirm the part number and connector layout of your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control/blower compartment access panel.
3. Document — Photograph every wire harness and connector on the board before disconnecting.
4. Remove — Unplug the harnesses and unscrew the failed board from its standoffs.
5. Install — Mount the new board and reconnect each harness per your photo, confirming the 24V and line connections are correct.
6. Test — Restore power and verify a full heat sequence: inducer, ignition, flame proof, and blower.

Signs You Need a Replacement

• Furnace does not respond to a thermostat heat call
• Repeated lockouts or diagnostic error codes
• Blower or inducer won't energize in sequence
• Visible burn marks, scorched traces, or relay damage on the board

Shipping & Returns

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