ICP Furnace Control Board Kit for RGS300LTFA0AAAA — OEM Integrated Control | Ships Today

Overview

This genuine OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for ICP, Tempstar, and Heil gas furnaces. The board is the brain of the furnace — it manages the ignition sequence, blower and inducer timing, safety limit and flame-sensing logic, and diagnostic fault codes. As a complete kit it includes the board and the hardware needed for a clean swap. When a control board fails you may see no response on a heat call, blower or inducer that won't run, erratic cycling, blank or flashing diagnostic LEDs, or repeated lockouts that persist after other components check out good.

Specifications

Compatibility

Factory replacement kit for ICP/Tempstar/Heil model RGS300LTFA0AAAA and related RGS300 series furnaces using control board 1183618. Verify the OEM number on your existing board and match all connector locations.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the furnace control/blower service panel.
3. Document — Photograph every connector, plug, and jumper position on the old board before disconnecting.
4. Remove — Unplug all harnesses and unfasten the board from its standoffs.
5. Install — Mount the new board, transfer any jumpers/links, and reconnect each harness to the matching connector per your photo.
6. Test — Restore power and run a full heat cycle, confirming proper ignition, blower timing, and no fault codes.

Signs You Need a Replacement

• No response from the furnace on a call for heat
• Blower or inducer motor won't energize
• Blank, dead, or continuously flashing diagnostic LED
• Repeated lockouts after other components test good

Shipping & Returns

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