ICP Furnace Control Board for RGS120SEAB0AAA — Integrated Ignition Control | Ships Today

Overview

This OEM integrated furnace control board (part number 1183618) is the electronic brain of the ICP/Tempstar/Heil RGS120SEAB0AAA gas furnace. It manages the ignition sequence, blower and inducer timing, gas valve operation, and safety lockouts, coordinating every component through a single 24V control circuit. When a control board fails you typically see no ignition, the furnace short-cycling, the blower running constantly, or LED fault codes that won't clear. Replacing the board with a genuine OEM unit restores correct timing and safety logic so the furnace fires reliably and runs through a full heating cycle.

Specifications

Compatibility

Engineered for the ICP/Tempstar/Heil RGS120SEAB0AAA gas furnace. This board is a direct OEM replacement and is also used across related RGS120-series cabinets. Always confirm your existing board's part number 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 furnace blower-compartment service panel.
3. Document — Photograph every wire and connector on the board before disconnecting.
4. Remove — Unplug each harness, release the mounting standoffs or screws, and lift out the old board.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power, start a heat call, and verify a full ignition, flame-proving, and blower cycle with no fault codes.

Signs You Need a Replacement

• Furnace will not ignite or the inducer/blower never starts
• Persistent or flashing LED fault codes on the board
• Short-cycling or blower that runs continuously
• Visible burn marks, corrosion, or a cracked relay on the board

Shipping & Returns

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