ICP Furnace Control Board Kit for RGS300STFA0AAAA — OEM | Ships Today

Overview

This is the genuine OEM control board kit (part 1183618) for the ICP / Tempstar / Heil RGS300STFA0AAAA gas furnace. The integrated furnace control board is the brain of the system: it manages the ignition sequence, sequences the inducer and blower motors, monitors safety limits and pressure switches, controls the gas valve and ignitor timing, and runs the flame-sense and diagnostic logic. When the board fails, the furnace may not start at all, may lock out on diagnostics, may cycle the blower or inducer erratically, or may flash fault codes on the board LED. Supplied as a kit, it includes the components needed for a complete OEM-spec replacement.

Specifications

Compatibility

Direct-fit OEM replacement kit for the ICP / Tempstar / Heil RGS300STFA0AAAA furnace and related RGS-series units using control board kit part 1183618. Verify 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 control/blower compartment service panel.
3. Document — Photograph every wire harness and terminal on the existing board before disconnecting.
4. Remove — Unplug each connector, then unscrew the old board from its standoffs.
5. Install — Mount the new board, transfer connectors exactly per your photo, and set any jumpers/dip switches to match the original.
6. Test — Restore power and run a full heat cycle, confirming proper ignition sequencing and no fault codes on the diagnostic LED.

Signs You Need a Replacement

• Furnace completely dead or no response to a heat call.
• Diagnostic LED flashing a hard-fault or lockout code.
• Erratic blower or inducer operation and short cycling.
• Visible burn marks, scorched relays, or corroded traces on the board.

Shipping & Returns

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