ICP Furnace Control Board Kit for RGS303SEEA0AAAA — OEM 1183618 | Ships Today

Overview

This genuine OEM control board kit (part number 1183618) for ICP, Tempstar, Heil, and Comfortmaker gas furnaces is the brain of the heating system. It manages the entire ignition sequence — inducer purge, igniter warm-up or spark, gas valve timing, flame sensing, and blower on/off delays — while monitoring safety limits and pressure switches. When the board fails you may see no response to a heat call, blinking diagnostic LEDs, blower or inducer that won't run, or random lockouts. The kit ships with the matched board and mounting hardware so you can restore full, code-correct furnace operation. Always record the existing board's diagnostic flash code before swapping.

Specifications

Compatibility

Engineered for the ICP/Tempstar/Heil RGS303SEEA0AAAA gas furnace and related RGS303-series models that originally used control board kit 1183618. Verify the printed board number against your existing control before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment service panel.
3. Document — Photograph every harness, plug, and terminal, and note the existing diagnostic flash code.
4. Remove — Unplug all connectors, release the board from its standoffs, and lift it out.
5. Install — Mount the new board on the supplied standoffs and reconnect each harness to the matching terminal per your photo.
6. Test — Restore power, call for heat, and confirm a full ignition sequence with no fault codes.

Signs You Need a Replacement

• No response from the furnace on a heat call.
• Steady or rapid LED fault codes indicating board failure.
• Inducer or blower that won't energize despite good inputs.
• Random lockouts or scrambled ignition timing.

Shipping & Returns

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