ICP Furnace Control Board Kit for RGS300HSAA0AAAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part 1183618) is the brain of your ICP RGS300HSAA0AAAA furnace. The integrated furnace control manages the entire heating sequence — it powers the inducer, energizes the igniter, opens the gas valve, monitors the flame sensor and pressure switch safeties, and controls blower timing. When the board fails, the furnace may do nothing on a call for heat, skip a step in the ignition sequence, run the blower constantly, or throw diagnostic fault codes on its LED. Because the board ties every component together, a faulty control is often the root cause behind symptoms that look like a bad igniter, valve, or motor. This kit restores full, code-correct operation.

Specifications

Compatibility

Designed for the ICP RGS300HSAA0AAAA and the matching Heil, Tempstar, and Comfortmaker furnaces that use this control platform. Verify the board's connector layout and part number against your original 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 furnace control-compartment door.
3. Document — Photograph every harness connector and wire location before unplugging anything.
4. Remove — Disconnect each plug, remove the mounting screws, and lift the old board out.
5. Install — Mount the new board, then reconnect each harness to its matching terminal per your photo.
6. Test — Restore power and run a full heat cycle; confirm correct ignition, safety, and blower sequencing with no fault codes.

Signs You Need a Replacement

• No response on a call for heat with power confirmed
• Blower or inducer runs continuously or not at all
• Repeating diagnostic LED fault codes
• Intermittent operation or burned/scorched spots on the board

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns and the National HVAC Parts fitment guarantee on every OEM order.