ICP Furnace Control Board Kit for RGS120HSBA0AAA — OEM Replacement | Ships Today

Overview

This OEM control board kit (part 1183618) is the genuine ICP/Heil/Tempstar integrated furnace control for the RGS120HSBA0AAA gas furnace. The board is the brain of the furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower while monitoring safety inputs like the pressure switch, limit, and flame sensor. It also stores and flashes diagnostic fault codes. When the board fails, the furnace may be completely dead, stuck on a continuous blower, locked out on ignition, or short-cycling with no clear cause. The kit ships with the necessary hardware and instructions for a direct OEM replacement.

Specifications

Compatibility

Direct fit for the ICP/Heil/Tempstar RGS120HSBA0AAA and other ICP-family furnaces specifying control board kit 1183618. Verify the board layout and connector positions against your existing board before installing.

Installation Guide

1. Safety First — Shut off gas and power, then verify zero voltage with a multimeter.
2. Access — Remove the blower compartment service panel.
3. Document — Photograph every wire and connector before unplugging.
4. Remove — Unplug all harnesses, note any DIP switch settings, and unscrew the old board.
5. Install — Mount the new board, match DIP switch settings, and reconnect each harness per your photo.
6. Test — Restore gas and power and confirm a full ignition and heating cycle.

Signs You Need a Replacement

• Furnace completely unresponsive with no diagnostic LED
• Blower runs continuously or won't start at all
• Random short-cycling or ignition lockouts with no other cause
• Visible burn marks, cracked 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.