ICP Furnace Control Board Kit for RGX048KEXA0AAA — 1183618 OEM | Ships Today

Overview

This OEM control board kit (OEM part #1183618) is the integrated furnace control (IFC) for the ICP/Tempstar/Heil RGX048KEXA0AAA gas furnace. The board is the brain of the furnace: it sequences the inducer, igniter, gas valve, and blower, monitors safety switches and the flame sensor, and manages diagnostics via its onboard LED fault codes. When the board fails the furnace may do nothing on a heat call, short-cycle, run the blower continuously, or flash an error code. Supplied as a kit with the hardware and instructions needed for a clean replacement.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil RGX048KEXA0AAA gas furnace and related Comfortmaker/Heil/Tempstar models that specify OEM control board kit 1183618. Confirm the part number printed on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, verify zero voltage with a multimeter, and shut off the gas.
2. Access — Remove the furnace blower/control panel.
3. Document — Photograph every wire and connector on the existing board before disconnecting anything.
4. Remove — Label and unplug all harnesses, remove the mounting screws, and lift out the old board.
5. Install — Mount the new board, transfer connections exactly per your photos, and set any jumpers/dip switches to match.
6. Test — Restore gas and power, run a full heat and cool cycle, and confirm the diagnostic LED shows a normal status.

Signs You Need a Replacement

• No response on a heat call — no inducer, igniter, or blower.
• Blower runs constantly or fails to start.
• Furnace short-cycles or locks out intermittently.
• Diagnostic LED flashes a hard fault or is completely dead.

Shipping & Returns

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