ICP Furnace Control Board Kit for RGS243LDFA0AAAA — Integrated Ignition Module | Ships Today

Overview

This OEM control board kit (part #1183618) is the integrated furnace control (IFC) — the brain of your ICP/Tempstar/Heil RGS243LDFA0AAAA gas furnace. It manages the entire heating sequence: it reads the thermostat call, runs ignition timing, sequences the inducer and blower motors, monitors the flame sensor and pressure switches, and provides safety lockout and diagnostic fault codes via its onboard LED. When this board fails, the furnace may be completely dead, short-cycle, run the blower continuously, or flash a fault code that won't clear. The kit ships with the mounting hardware and instructions needed for a clean replacement.

Specifications

Compatibility

Supplied as a direct-fit replacement kit for the ICP/Tempstar/Heil RGS243LDFA0AAAA and other furnaces specifying OEM part 1183618. Verify the wiring harness plug layout matches your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control compartment service panel.
3. Document — Photograph every connector and wire on the old board before disconnecting.
4. Remove — Unplug each harness, release the board standoffs or screws, and lift out the old control.
5. Install — Mount the new board with the included hardware and transfer each connector to its matching plug per your photo.
6. Test — Restore power, call for heat, and confirm the full ignition-to-blower sequence runs with no fault codes.

Signs You Need a Replacement

• Furnace completely dead with no response to the thermostat
• Persistent or unclearable LED fault code
• Blower or inducer runs continuously or never starts
• Short-cycling or failure to complete the ignition sequence

Shipping & Returns

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