ICP Furnace Control Board for RGS243HTFA0AAAA — OEM Kit 1183618 | Ships Today

Overview

This OEM integrated furnace control board (kit 1183618) is the central controller for the ICP/Tempstar/Heil RGS243HTFA0AAAA gas furnace. It sequences ignition, controls blower on/off timing, monitors the flame-sense safety circuit, and watches the limit and pressure switches. A failed board typically causes no ignition, short-cycling, premature lockout, or blinking fault codes on the diagnostic LED. Heat-stressed relays, corroded connectors, and cracked solder joints are the usual culprits. As a genuine OEM kit, its relay ratings, connector pinouts, and control timing match the furnace precisely — avoiding the miswire and timing problems that plague universal boards.

Specifications

Compatibility

Engineered for the ICP/Tempstar/Heil RGS243HTFA0AAAA gas furnace and shared across several RGS-series furnaces of this generation. Confirm the printed part number 1183618 on your existing board 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 blower compartment service panel.
3. Document — Photograph every wire and connector position before disconnecting anything.
4. Remove — Unplug the molex harnesses, release the board standoffs/screws, and lift the old control board out.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power, call for heat, and confirm a complete ignition and blower cycle with no fault codes.

Signs You Need a Replacement

• Furnace will not ignite or blower never energizes
• Repeated safety lockouts or blinking diagnostic fault codes
• Visible burn marks, melted relays, or corrosion on the board
• Intermittent operation that worsens with heat or vibration

Shipping & Returns

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