ICP Control Board Kit for RGS300SFFA0AAAA — OEM Furnace Board | Ships Today

Overview

This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) — the brain of your ICP RGS300SFFA0AAAA furnace. It manages the entire heating sequence: it reads the thermostat call, runs the inducer and pressure-switch safety checks, energizes the hot surface igniter, opens the gas valve, confirms flame, and times the blower on and off. It also monitors limits and flashes diagnostic fault codes. When the board fails, you may see no response to a heat call, erratic or short cycling, blower problems, or repeated lockouts with no clear mechanical cause. The kit includes the OEM-spec board for a direct replacement that restores correct sequencing, safety monitoring, and diagnostics.

Specifications

Compatibility

Engineered for the ICP / Tempstar / Heil RGS300SFFA0AAAA furnace and other units specifying OEM part 1183618. Confirm the part number against the label on your existing board before ordering to ensure exact fitment.

Installation Guide

1. Safety First — Disconnect power and shut off the gas, then verify zero voltage with a multimeter.
2. Access — Remove the furnace service panel to reach the control board.
3. Document — Photograph every wire and connector on the old board before disconnecting.
4. Remove — Unplug each harness, remove the mounting screws, and lift out the failed board.
5. Install — Mount the new board, transfer any jumpers/links, and reconnect every connector exactly per your photo.
6. Test — Restore gas and power, run a full heat cycle, and confirm proper sequencing and no fault codes.

Signs You Need a Replacement

• No response from the furnace on a thermostat call.
• Short cycling or erratic, unpredictable operation.
• Blower won't start or runs continuously.
• Repeated lockouts or fault codes with no mechanical cause; burned spots on the board.

Shipping & Returns

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