ICP Furnace Control Board Kit for RGS120STBA0AAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part 1183618) is the integrated furnace control (IFC) for the ICP / Heil / Tempstar RGS120STBA0AAA gas furnace. The board manages the entire heating sequence: it powers the inducer, proves the pressure switch, energizes the hot surface igniter, opens the gas valve, monitors flame via the sensor, and controls blower timing on heat and cool. When the board fails you typically see erratic behavior — the furnace ignites intermittently, the blower runs constantly or not at all, or the unit locks out with a flashing diagnostic LED. Heat damage, blown traces, failed relays, and corroded connectors are the usual culprits. This kit ships with the board and the mounting/connector hardware needed for a direct replacement.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil RGS120STBA0AAA furnace and shared platform models. Match the OEM number and connector layout on your existing board before ordering, as IFC boards are model-specific.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and verify zero voltage with a multimeter.
2. Access — Remove the blower compartment service panel.
3. Document — Photograph every wire and connector position on the old board before disconnecting.
4. Remove — Unplug all harnesses, remove the mounting screws, and lift the old board out.
5. Install — Mount the new board and reconnect each harness exactly per your photos.
6. Test — Restore power and run a full heat and cool cycle, confirming correct ignition and blower timing.

Signs You Need a Replacement

• Furnace dead with no LED or a continuous fault code.
• Blower running nonstop or failing to start.
• Intermittent ignition or random lockouts.
• Visible scorching, burned relays, or corroded pins on the board.

Shipping & Returns

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