ICP Furnace Control Board for RGS243STFA0AAAA — OEM Kit 1183618 | Ships Today

Overview

This is the OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil gas furnace model RGS243STFA0AAAA. The control board is the brain of the furnace — it manages the ignition sequence, monitors flame, sequences the inducer and blower motors, and runs continuous self-diagnostics with a blinking LED fault code. When this board fails, the furnace typically will not start, will lock out after a few ignition attempts, or will run the blower continuously. This is a complete plug-in replacement kit supplied with the correct mounting hardware and wiring connectors.

Specifications

Compatibility

Engineered as a direct OEM fit for the ICP/Tempstar/Heil RGS243STFA0AAAA gas furnace. This part is sold by exact model match — confirm your model number on the unit rating plate before ordering to guarantee correct fitment.

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 and connector on the existing board before disconnecting anything.
4. Remove — Unplug the low- and line-voltage harnesses, release the board mounting tabs/screws, and lift out the old board.
5. Install — Mount the new board, reconnect each harness exactly per your photo, and route wires clear of moving parts.
6. Test — Restore power, initiate a heat call, and confirm a full ignition cycle with no LED fault codes.

Signs You Need a Replacement

• Furnace does not respond to a thermostat heat call at all
• Repeated ignition lockout or flashing diagnostic LED fault code
• Blower runs constantly or fails to start
• Visible burns, scorch marks, or swollen relays on the existing board

Shipping & Returns

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