ICP Furnace Control Board Kit for RGS300HTAA0AAAA | Ships Today

Overview

This is a genuine OEM control board kit (part 1183618) for the ICP RGS300HTAA0AAAA gas furnace. The integrated furnace control is the brain of the system — it sequences the ignition, manages the inducer and blower relays, monitors flame sense and safety limits, and times the heat and cool cycles. When the board fails you may see erratic behavior, no response to the thermostat, blower running constantly, or flashing diagnostic LED fault codes. The kit ships with the board and the mounting/wiring hardware needed for a clean swap.

Specifications

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil RGS300HTAA0AAAA and related RGS300 series furnaces. Verify the connector layout and board part number against your existing control before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control-compartment service panel.
3. Document — Photograph every plug and wire on the old board before disconnecting.
4. Remove — Unplug the harnesses, release the standoffs or screws, and lift out the failed board.
5. Install — Mount the new board and transfer each connector to the matching terminal per your photo.
6. Test — Restore power, run a full heat and cool cycle, and confirm no fault codes on the diagnostic LED.

Signs You Need a Replacement

• No response to thermostat heat or cool calls
• Blower or inducer runs continuously or won't start
• Flashing diagnostic LED fault codes
• Visible burn marks, corrosion, or a blown fuse on the board

Shipping & Returns

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