ICP Furnace Control Board Kit for RGS300SSFA0AAAA — OEM 1183618 | Ships Today

Overview

This is a genuine OEM control board kit (part number 1183618) for ICP, Tempstar, and Heil gas furnaces. The integrated furnace control board is the brain of the system — it sequences the ignition cycle, manages the inducer and blower, monitors safety limits and the flame signal, and times each stage of heating. When the board fails you may see no response on a call for heat, blower or inducer that won't start, error codes flashing on the diagnostic LED, or short cycling. This kit includes the replacement board for a clean, reliable swap that restores full furnace control.

Specifications

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil RGS300SSFA0AAAA gas furnace and other RGS300-series units that use the 1183618 control board kit. Match your existing board part number before ordering, as furnace control boards are model-specific.

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 compartment service panel.
3. Document — Photograph every harness plug and wire location on the old board before disconnecting.
4. Remove — Unplug each connector, release the board standoffs, and lift out the failed board.
5. Install — Mount the new board, transfer all connectors to the matching ports per your photo, and confirm jumper/dip settings.
6. Test — Restore power and run a full heat cycle, watching the diagnostic LED for normal operation.

Signs You Need a Replacement

• No response from the furnace on a call for heat.
• Blower or inducer motor will not energize.
• Persistent fault codes or a dead diagnostic LED.
• Short cycling or erratic ignition sequencing.

Shipping & Returns

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