ICP Control Board Kit for RGS090SFAA0AAA — OEM 1183618 Furnace Board | Ships Today

Overview

This is the OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS090SFAA0AAA gas furnace. The control board is the brain of the furnace — it manages the ignition sequence, monitors safety limits and flame sensing, controls blower and inducer timing, and coordinates calls for heat from the thermostat. When a control board fails, the furnace may fail to ignite, short-cycle, throw flashing diagnostic LED fault codes, or stop responding to the thermostat entirely. This kit ships as a complete OEM replacement so you restore reliable, code-correct operation.

Specifications

Compatibility

Engineered for the ICP Tempstar Heil RGS090SFAA0AAA furnace and other units that specify OEM part 1183618. Always verify the part number printed on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, verify zero voltage with a multimeter, and shut off the gas supply.
2. Access — Remove the furnace blower/control compartment service panel.
3. Document — Photograph every wire and connector on the existing board before disconnecting anything.
4. Remove — Unplug the wiring harnesses and low-voltage terminals, then remove the mounting screws and lift out the old board.
5. Install — Mount the new board, reconnect each harness exactly per your photos, and confirm all locking tabs are seated.
6. Test — Restore gas and power, run a full heat cycle, and confirm the diagnostic LED shows normal operation with no fault codes.

Signs You Need a Replacement

• Furnace will not start or does not respond to the thermostat
• Flashing diagnostic LED fault codes on the control board
• Blower or inducer runs continuously or at the wrong times
• Intermittent ignition lockouts or short-cycling

Shipping & Returns

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