ICP Control Board Kit for RGS243HDFA0AAAA — OEM 1183618 Furnace Control | Ships Today

Overview

This is the genuine OEM furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS243HDFA0AAAA gas furnace. The integrated furnace control board is the brain of the unit — it sequences the ignition cycle, monitors flame and safety switches, controls the inducer and blower motors, and manages 24V relay timing. When this board fails, the furnace typically loses all function or locks out on a flashing diagnostic LED. Replacing it with the correct OEM board restores reliable, code-compliant operation.

Specifications

Compatibility

Designed as a direct-fit replacement for the ICP / Tempstar / Heil RGS243HDFA0AAAA furnace. This family of branded units (ICP, Tempstar, Heil, Comfortmaker) shares common control platforms, so always verify your existing board's part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace blower-compartment service panel.
3. Document — Photograph every wire harness and connector on the existing board before disconnecting.
4. Remove — Unplug all connectors, release the board standoffs/screws, and lift out the failed control board.
5. Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power and run a full heat cycle; confirm ignition, flame proving, and blower handoff with no fault codes.

Signs You Need a Replacement

• Furnace completely dead with no LED activity or a steady fault code.
• Inducer or blower won't start despite a thermostat call.
• Intermittent lockouts or random resets during operation.
• Visible burnt traces, scorch marks, or failed relays on the board.

Shipping & Returns

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