ICP Control Board Kit for RGS300SEAA0AAAA — OEM 1183618 | Ships Today

Overview

This is a genuine OEM control board kit (part number 1183618) for ICP, Tempstar, and Heil gas furnaces. The furnace control board is the brain of the unit: it manages the ignition sequence, monitors safety limits and pressure switches, controls the inducer and blower timing, and communicates fault codes via its diagnostic LED. When the board fails, the furnace may not respond to the thermostat, may short-cycle, may run the blower continuously, or may flash error codes with no heat. This kit supplies the OEM-correct board along with the mounting and wiring hardware needed for a clean replacement, restoring proper sequencing and safety monitoring.

Specifications

Compatibility

Designed for the ICP Tempstar Heil RGS300SEAA0AAAA and other ICP-family furnaces that specify kit 1183618. Match the OEM part number on your existing board 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 control/blower compartment service panel.
3. Document — Photograph every plug, connector, and wire on the existing board before removing anything.
4. Remove — Unplug all harnesses and unscrew the old board from its standoffs.
5. Install — Mount the new board and reconnect each harness in the identical position per your photo.
6. Test — Restore power, run a full heat cycle, and confirm the diagnostic LED shows a normal status with no fault codes.

Signs You Need a Replacement

• Furnace doesn't respond to the thermostat.
• Short-cycling or continuous blower operation.
• Diagnostic LED flashing a board/control fault code.
• Visible burn marks, corrosion, or a blown fuse on the board.

Shipping & Returns

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