ICP Furnace Control Board Kit for RGS300HFFA0AAAA — OEM Ignition Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the brain of your ICP RGS300HFFA0AAAA gas furnace. It sequences the ignition cycle, energizes the inducer and igniter, opens the gas valve, times the blower on/off delays, and monitors the safety string of limits and pressure switches. A failed board produces erratic behavior — no ignition, blower that won't start or won't stop, random lockouts, or a unit completely dead on a heat call. The kit ships with the mounting hardware and instructions needed for a clean swap.

Specifications

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil RGS300HFFA0AAAA furnace and other ICP-family furnaces calling out kit 1183618. Verify the board's connector layout and harness match your existing unit before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, shut off the gas, and verify zero voltage with a multimeter.
2. Access — Remove the control-compartment service panel.
3. Document — Photograph every plug and wire on the old board — this is the most important step for a control board swap.
4. Remove — Unplug each harness, release the standoffs or screws, and lift out the old board.
5. Install — Mount the new board, then transfer each connector one at a time exactly per your photos.
6. Test — Restore gas and power, run a full heat cycle, and confirm correct ignition, blower timing, and shutdown.

Signs You Need a Replacement

• No response on a heat call — inducer, igniter, and blower all dead.
• Blower runs continuously or never starts.
• Random lockouts or error codes with healthy sensors.
• Visible burn marks, corrosion, or a blown fuse on the board.

Shipping & Returns

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