ICP Furnace Control Board for RGX036KECA0AAA — OEM 1183618 | Ships Today

Overview

This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) brain of the ICP/Tempstar/Heil RGX036KECA0AAA gas furnace. It sequences the entire heating cycle — inducer start, pressure switch proving, igniter warm-up, gas valve timing, blower on/off delays, and safety lockouts — and reads the flame sensor to confirm ignition. When the board fails, the furnace may be completely dead, stuck on continuous blower, flashing diagnostic fault codes, or short-cycling. Replacing it with the correct OEM kit restores proper timing and safety control. The kit ships with the board and required mounting hardware where applicable.

Specifications

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil RGX036KECA0AAA furnace and other ICP-family models that originally used board 1183618. Confirm the printed board number and connector layout match your existing control before installing.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the blower/control compartment service panel.
3. Document — Photograph every wire and terminal on the existing board before disconnecting anything.
4. Remove — Unplug the harnesses and low-voltage leads, then remove the board mounting screws.
5. Install — Mount the new board and reconnect each connector exactly per your photo; set any dip switches/jumpers to match the original.
6. Test — Restore power and run a full heat cycle; verify normal sequencing and no fault codes on the diagnostic LED.

Signs You Need a Replacement

• Furnace is completely unresponsive with no diagnostic LED.
• Blower runs continuously or fails to start.
• Persistent fault-code flashes pointing to the control.
• Erratic short-cycling not explained by sensors or switches.

Shipping & Returns

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