ICP Furnace Control Board Kit for RGS243STAA0AAAA — OEM 1183618 | Ships Today

Overview

This ICP control board kit (OEM part 1183618) is the genuine integrated furnace control (IFC) for the RGS243STAA0AAAA. The control board is the brain of the furnace — it sequences the ignition cycle, manages the inducer and blower motors, monitors safety devices and flame sensing, and runs the diagnostic LED fault codes. A failed board causes intermittent operation, no-heat or no-blower conditions, blown fuses, or flashing error codes. Supplied as a complete kit, this OEM board restores correct timing, safety lockout behavior, and reliable operation to the factory specification.

Specifications

Compatibility

Direct-fit OEM control board kit for the ICP/Tempstar/Heil RGS243STAA0AAAA gas furnace. This is the factory-specified integrated furnace control for this model. Confirm the part number on your existing board against 1183618 before ordering, as control boards are model-specific.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, and verify zero voltage with a multimeter before touching the board.
2. Access — Remove the control/electrical compartment service panel.
3. Document — Photograph every harness plug, terminal, and dip-switch setting before disconnecting.
4. Remove — Unplug all connectors, remove the board mounting screws, and lift out the old board.
5. Install — Mount the new board, match any dip-switch settings to the original, and reconnect every harness exactly per your photo.
6. Test — Restore power, call for heat, and confirm a full ignition cycle with no fault codes on the diagnostic LED.

Signs You Need a Replacement

• Furnace dead with no response to a heat call
• Flashing diagnostic LED error / lockout codes
• Inducer or blower won't run, or runs out of sequence
• Repeated blown low-voltage fuses or burnt connectors on the board

Shipping & Returns

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