ICP Furnace Control Board Kit for RGS120LRCB0AAA — OEM Ignition Control | Ships Today

Overview

This is the genuine OEM furnace control board kit (part 1183618) for the ICP / Tempstar / Heil RGS120LRCB0AAA gas furnace. The integrated control board is the brain of the furnace — it sequences the ignition cycle, energizes the hot surface igniter and gas valve, monitors the flame sensor and pressure/limit safety switches, and times the inducer and blower motors. When the board fails, the furnace may not respond to a call for heat, may lock out on a self-diagnostic fault, or may run the blower continuously. The kit includes the replacement board so you can restore proper, safe sequencing in a single service call.

Specifications

Compatibility

Engineered for the ICP-family RGS120LRCB0AAA gas furnace and related ICP, Tempstar, Heil, and Comfortmaker furnaces specifying control board kit 1183618. Match your existing board part number and connector layout 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 furnace control/blower access panel.
3. Document — Photograph every harness plug and wire location on the old board before disconnecting.
4. Remove — Unplug each connector, remove the board mounting screws, and lift out the failed board.
5. Install — Mount the new board, transfer any jumpers/links, and reconnect each harness exactly per your photo.
6. Test — Restore power, start a heat cycle, and verify correct ignition sequence, flame sensing, and blower timing with no fault codes.

Signs You Need a Replacement

• Furnace fails to respond to a call for heat
• Repeated lockouts or blinking fault codes at the board LED
• Blower or inducer runs continuously or not at all
• Visible burnt traces, scorched relays, or corrosion on the board

Shipping & Returns

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