ICP Control Board for RGS243SFAA0AAAA — OEM Furnace Control Kit 1183618 | Ships Today

Overview

This OEM integrated furnace control board kit (part #1183618) is the electronic command center of your ICP / Tempstar / Heil RGS243SFAA0AAAA gas furnace. It sequences ignition, controls blower and inducer timing, monitors safety switches, and coordinates the thermostat, igniter, gas valve, and pressure switches throughout each heat cycle. When the board fails, the furnace can no longer safely run a heat call. Typical symptoms include no ignition, no blower or a blower that runs nonstop, diagnostic LED fault codes, and intermittent no-heat shutdowns. The board runs on a 24V control circuit and provides onboard diagnostics that make troubleshooting faster and more accurate.

Specifications

Compatibility

Engineered as a direct OEM replacement for the ICP / Tempstar / Heil RGS243SFAA0AAAA gas furnace and compatible Comfortmaker / Heil models sharing this control platform. Always verify your existing board part number 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 furnace blower/control compartment door.
3. Document — Photograph every wire and connector position on the old board before disconnecting.
4. Remove — Unplug the molded harness connectors, disconnect the spade terminals, and unscrew the failed board from its standoffs.
5. Install — Mount the new board and reconnect each harness and terminal exactly per your photo.
6. Test — Restore power, run a heat call, and confirm proper ignition, blower, and inducer sequencing on the diagnostic LED.

Signs You Need a Replacement

• Furnace will not ignite or respond to a heat call
• Diagnostic LED shows a fault/lockout flash code
• Blower or inducer runs continuously or never starts
• Intermittent no-heat or random shutdowns

Shipping & Returns

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