ICP Furnace Control Board for RGS300LEEA0AAAA — OEM Kit 1183618 | Ships Today

Overview

The ICP control board kit (OEM part 1183618) is the integrated furnace control (IFC) that governs the entire heating sequence on your ICP / Tempstar / Heil RGS300LEEA0AAAA gas furnace. This circuit board sequences ignition, proves flame and monitors safety limits, drives the inducer and blower motors, and times the heat and cool cycles. A failed board commonly causes no ignition, repeated lockouts, a blower that runs nonstop, or a furnace that ignores the thermostat. As the brain of the appliance, replacing it with a genuine OEM kit restores reliable, code-correct operation.

Specifications

Compatibility

This OEM control board kit is engineered for the ICP Tempstar Heil RGS300LEEA0AAAA gas furnace and related RGS300-series equipment that calls for OEM 1183618. Always confirm the part number printed on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace blower/control panel to expose the board.
3. Document — Photograph every wire and connector position before disconnecting.
4. Remove — Unplug the molex harnesses and spade terminals, then unscrew the failed board from its standoffs.
5. Install — Mount the new board, transfer any jumper/DIP settings, and reconnect each harness exactly per your photos.
6. Test — Restore power and run a full heat cycle, confirming ignition, flame proving, and blower operation.

Signs You Need a Replacement

• Furnace will not ignite or locks out after repeated trial-for-ignition attempts
• Blower runs constantly or fails to start during a heat call
• No response to thermostat or erratic short-cycling
• Visible burnt traces, scorch marks, or a blown onboard fuse

Shipping & Returns

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