ICP Furnace Control Board Kit for RGS120HTCB0AAA — OEM 1183618 | Ships Today

Overview

This genuine OEM control board kit (part number 1183618) is the integrated furnace control for the ICP/Tempstar/Heil RGS120HTCB0AAA gas furnace. The control board is the brain of the furnace — it sequences the inducer motor, energizes the hot surface igniter, opens the gas valve, proves flame via the flame sensor, and times blower on/off delays while monitoring the limit and pressure safety switches. When the board fails you may see no response to a heat call, a furnace stuck on continuous blower, blown fuses, or erratic flashing diagnostic codes. Replacing the board with the genuine OEM kit restores correct ignition sequencing and all built-in safety interlocks.

Specifications

Compatibility

Built for the ICP family model RGS120HTCB0AAA and equivalent ICP, Tempstar, Heil, and Comfortmaker gas furnaces using this integrated control. Confirm the board part number and connector layout against your existing unit.

Installation Guide

1. Safety First — Disconnect electrical power and shut off the gas. Verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment panel.
3. Document — Photograph every connector, plug, and wire location on the old board before disconnecting.
4. Remove — Unplug all harnesses and unscrew the failed board from its standoffs.
5. Install — Mount the new board and reconnect each harness to its matching plug per your photo. Set any speed taps or jumpers to match the original.
6. Test — Restore gas and power and run a full heat cycle, confirming proper ignition sequence and blower timing.

Signs You Need a Replacement

• No response from the furnace on a call for heat
• Blower runs continuously or won't start
• Rapid or abnormal diagnostic LED flash codes
• Repeated blown low-voltage fuses or no igniter voltage

Shipping & Returns

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