ICP Furnace Control Board Kit for RGS303LEFA0AAAA — Integrated Control | Ships Today

Overview

This OEM control board kit (OEM part 1183618) is the integrated furnace control (IFC) — the brain that sequences your ICP, Tempstar, or Heil gas furnace through every heat and cool cycle. It manages the inducer, ignition, gas valve, blower timing, and safety lockouts, while reading the thermostat, pressure switch, limit switch, and flame sensor. A failed board produces erratic behavior: no ignition, blower that won't start or won't stop, short cycling, or a unit that's completely unresponsive. The kit includes the replacement board so you can restore full, code-compliant operation in a single service visit.

Specifications

Compatibility

Directly fits the ICP/Tempstar/Heil RGS303LEFA0AAAA and is supplied as the factory replacement kit for this Carrier-family furnace. Match the board's connector layout and part number to the original before installing.

Installation Guide

1. Safety First — Disconnect electrical power and shut off the gas; verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment door to expose the mounted board.
3. Document — Photograph every wire harness and connector position before disconnecting.
4. Remove — Unplug each connector, release the board from its standoffs, and lift it out.
5. Install — Seat the new board on the standoffs and reconnect each harness to its matching plug per your photo.
6. Test — Restore gas and power, run a full heat cycle, and confirm correct inducer, ignition, and blower sequencing.

Signs You Need a Replacement

• Furnace completely unresponsive to thermostat calls
• No ignition sequence or repeated lockouts with no obvious cause
• Blower runs constantly or fails to engage on a heat call
• Visible scorch marks, burned relays, or blown traces on the board

Shipping & Returns

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