ICP Furnace Control Board Kit for RGS300SSAA0AAAA — OEM 1183618 | Ships Today

Overview

This is a genuine OEM control board kit (part number 1183618) for the ICP Tempstar Heil RGS300SSAA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it sequences the inducer, ignitor, gas valve, and blower, monitors flame and the limit/pressure safeties, and runs onboard diagnostics via a status LED. The kit includes the board and required mounting hardware. A failed board causes no ignition, no blower, erratic cycling, or flashing fault codes. Replacing it restores full, safe furnace operation.

Specifications

Compatibility

Designed for the ICP Tempstar Heil RGS300SSAA0AAAA and related ICP-family furnaces specifying the 1183618 control board kit. Confirm the board's part number and connector layout against your existing board before ordering.

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 panel.
3. Document — Photograph every connector and wire location on the old board before unplugging.
4. Remove — Unplug the harnesses, remove the mounting screws, and lift out the failed board.
5. Install — Mount the new board with the included hardware and transfer each connector exactly per your photo.
6. Test — Restore power, run a full heating cycle, and confirm the status LED shows normal operation.

Signs You Need a Replacement

• No ignition or blower despite a thermostat call
• Flashing fault/diagnostic LED codes
• Erratic short-cycling or random shutdowns
• Visible burn marks, corrosion, or a blown onboard fuse

Shipping & Returns

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