ICP Furnace Control Board Kit for RGS120HEAB0AAA — Integrated Ignition Control | Ships Today

Overview

This OEM integrated furnace control board kit (part #1183618) is the brain of your ICP, Heil, or Tempstar RGS120HEAB0AAA 120,000 BTU gas furnace. It sequences the entire heat cycle — inducer draft, igniter warm-up, gas valve timing, flame sensing, and blower on/off delays — while monitoring safeties and flashing diagnostic fault codes. A failed board causes intermittent no-heat, blower or inducer that won't start or won't stop, or repeated hard lockouts. Because the board ties together 24V control and 120V line-voltage loads, it is a frequent failure point after voltage spikes, lightning, or aged relays.

Specifications

Compatibility

Built for the ICP/Heil/Tempstar RGS120HEAB0AAA 120K BTU gas furnace and related RGS120 series units. Verify the board part number printed on your existing control before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the blower/control compartment service panel.
3. Document — Photograph every wire and terminal position on the existing board.
4. Remove — Unplug all connectors and the molex harness, remove the mounting screws, and lift the old board out.
5. Install — Mount the new board and reconnect every wire exactly per your photo and the wiring diagram.
6. Test — Restore power, run a full heat cycle, and confirm the diagnostic LED shows normal operation with no fault codes.

Signs You Need a Replacement

• Intermittent or complete furnace no-heat with no other failed parts
• Blower or inducer motor won't start or won't shut off
• Diagnostic LED dark, or flashing internal control fault codes
• Burners light then immediately drop out despite a good flame sensor

Shipping & Returns

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