ICP Furnace Control Board for RGS303HFEA0AAAA – OEM Control Board Kit 1183618 | Ships Today

Overview

This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) that manages every sequence of operation on your ICP Tempstar Heil RGS303HFEA0AAAA gas furnace. It coordinates the inducer motor, hot surface igniter, gas valve, blower timing, and safety lockouts while monitoring the limit and pressure switches. When the board fails, the furnace may not respond to the thermostat, may short-cycle, may lock out, or may fail to energize the igniter or blower. The kit ships complete for a clean, reliable replacement and restores proper diagnostic LED fault reporting.

Specifications

Compatibility

Direct-fit replacement for the ICP Tempstar Heil RGS303HFEA0AAAA furnace and ICP-family units that specify control board kit 1183618. Verify the printed board number on your existing control before ordering.

Installation Guide

1. Safety First – Disconnect power at the switch and breaker, shut off gas, and verify zero voltage with a multimeter.
2. Access – Remove the furnace control/blower compartment service panel.
3. Document – Photograph every wire and connector position on the old board before disconnecting.
4. Remove – Unplug all connectors and remove the mounting screws or standoffs holding the board.
5. Install – Mount the new board and reconnect every harness exactly per your photo.
6. Test – Restore gas and power, run a full heat cycle, and confirm the diagnostic LED shows normal operation.

Signs You Need a Replacement

• Furnace unresponsive to thermostat calls
• No igniter, inducer, or blower activation
• Erratic short-cycling or repeated lockouts
• No diagnostic LED, or a hard-fault flash code on the board

Shipping & Returns

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