ICP Furnace Control Board Kit for RGS090STBA0AAA — OEM 1183618 | Ships Today

Overview

This OEM furnace control board kit (ICP part 1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS090STBA0AAA gas furnace. The board manages the ignition sequence, blower and inducer timing, safety interlocks, and diagnostic fault codes. When this board fails, the furnace may not respond to thermostat calls, the inducer or igniter may not energize, the blower may run continuously, or the diagnostic LED may flash a hard-lockout code. Because it coordinates every stage of the heating cycle, a faulty control board is one of the most common causes of a no-heat condition on this furnace platform.

Specifications

Compatibility

Engineered as the factory replacement for the ICP / Tempstar / Heil RGS090STBA0AAA furnace. The kit ships with the mounting hardware and connector references needed for a direct swap. Always confirm the part number 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 furnace blower/control compartment service panel.
3. Document — Photograph every wire and connector position on the old board before disconnecting.
4. Remove — Unplug the low- and line-voltage harnesses, release the board standoffs, and lift out the failed control.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly per your photos.
6. Test — Restore power, initiate a heat call, and confirm a full ignition cycle with no fault codes.

Signs You Need a Replacement

• Furnace does not respond to a thermostat heat call
• Diagnostic LED shows a hard lockout or no light at all
• Inducer, igniter, or blower fails to energize in sequence
• Visible burn marks, corrosion, or cracked solder on the board

Shipping & Returns

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