ICP Furnace Control Board Kit for RGS300LRFA0AAAA — OEM Replacement | Ships Today

Overview

This genuine OEM control board kit (part #1183618) is the integrated furnace control (IFC) — the brain of your ICP / Tempstar / Heil RGS300LRFA0AAAA furnace. It sequences the entire heating cycle: it powers the inducer, proves the pressure switch, energizes the igniter, opens the gas valve, monitors the flame sensor, and times the blower on and off. It also runs onboard safety lockouts and flashes diagnostic fault codes via its LED. When the board fails — usually from surges, cracked relays, or burned traces — you get intermittent no-heat, a furnace that won't start, blower problems, or erratic short cycling. Supplied as a complete kit for a clean OEM replacement.

Specifications

Compatibility

Direct OEM fit for ICP / Tempstar / Heil / Comfortmaker model RGS300LRFA0AAAA and related RGS300 series furnaces. Match the part number and connector layout to your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control/blower compartment service panel.
3. Document — Photo every connector and wire harness location before unplugging anything.
4. Remove — Unplug the harnesses and remove the mounting screws; lift out the old board.
5. Install — Mount the new board, then reconnect each harness to its matching plug per your photo.
6. Test — Restore power, call for heat, and verify a full ignition and blower cycle with no fault codes.

Signs You Need a Replacement

• Furnace completely dead with no LED activity
• Intermittent no-heat or random short cycling
• Blower won't start or won't shut off
• Visible burned relays, scorch marks, or error codes

Shipping & Returns

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