ICP Control Board Kit for RGS300HEFA0AAAA — Furnace Ignition Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the brain of your ICP RGS300HEFA0AAAA gas furnace. It sequences the entire heat cycle — proving the inducer, energizing the igniter, opening the gas valve, monitoring flame, and timing blower on/off — while watching limit and pressure safeties throughout. The kit ships with the board and the hardware needed for a clean swap. Board failures show up as a furnace that does nothing on a call for heat, blinking diagnostic LED fault codes, the blower running constantly, or intermittent operation. Power surges, moisture, and aging relays are the typical culprits.

Specifications

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil RGS300HEFA0AAAA. Match the OEM kit number to your unit's parts list — control boards are model-specific, so verify the part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and switch, then verify zero voltage with a multimeter.
2. Access — Remove the control compartment service panel.
3. Document — Photograph every connector and wire position before disconnecting; boards have many similar plugs.
4. Remove — Unplug each harness, release the board standoffs or screws, and lift the old board out.
5. Install — Seat the new board, then reconnect each harness to the matching terminal per your photos.
6. Test — Restore power, run a full heat cycle, and confirm no fault codes on the diagnostic LED.

Signs You Need a Replacement

• No response from the furnace on a call for heat.
• Diagnostic LED flashing hard-fault codes.
• Blower runs constantly or fails to start.
• Intermittent ignition, lockouts, or scorched spots on the board.

Shipping & Returns

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