ICP Furnace Control Board Kit for RGS121SECB0AAA — OEM Integrated Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the integrated furnace control (IFC) that runs the ignition, blower, and safety sequence on your ICP RGS121SECB0AAA gas furnace. The board manages the inducer, sequences the hot surface igniter and gas valve, controls blower-on and blower-off timing, monitors flame sense and limit/pressure safeties, and flashes diagnostic fault codes. When the board fails you may get no response on a call for heat, blower that won't start or won't shut off, erratic short cycling, or repeated lockouts with diagnostic LED codes. This complete kit is a direct OEM replacement that restores correct sequencing and safety operation.

Specifications

Compatibility

Designed for the ICP / Tempstar / Heil RGS121SECB0AAA gas furnace and related RGS-series units that use this integrated control. Match the board layout and connector pinouts against your original before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the blower-compartment service panel.
3. Document — Photograph every wiring harness and connector on the old board before unplugging.
4. Remove — Unplug all connectors, note dip-switch/jumper settings, and unfasten the failed board.
5. Install — Mount the new board, transfer any jumper/dip settings, and reconnect each harness per your photo.
6. Test — Restore power, run a full heat cycle, and confirm proper ignition, blower timing, and no fault codes.

Signs You Need a Replacement

• No response on a call for heat
• Blower won't start or runs continuously
• Repeated lockouts or diagnostic LED fault codes
• Erratic short cycling or out-of-sequence operation

Shipping & Returns

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