ICP Furnace Control Board for RGS240SDFA0AAAA — OEM Kit 1183618 | Ships Today

Overview

This is the genuine OEM integrated furnace control board (kit) for the ICP/Heil/Tempstar RGS240SDFA0AAAA gas furnace, OEM part number 1183618. The control board governs the entire heat cycle — it sequences ignition, monitors flame sense and safety limits, drives the inducer and blower motors, and times the gas valve. When the board fails the furnace may not ignite, short-cycle, lock out on faults, or fail to run the blower, often signaled by an erratic or missing diagnostic LED flash code.

Specifications

Compatibility

Engineered as a direct OEM fit for the ICP/Heil/Tempstar RGS240SDFA0AAAA furnace and other RGS240-series models that specify control board 1183618. Confirm the number on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
2. Access — Remove the blower compartment service panel.
3. Document — Photograph every wire and connector position on the existing board before disconnecting.
4. Remove — Unplug the harness connectors, remove the mounting screws/standoffs, and lift out the old board.
5. Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power, initiate a heat call, and confirm a full ignition cycle and correct blower operation.

Signs You Need a Replacement

• Furnace will not start or has no response on a heat call
• Blower or inducer does not run, or runs continuously
• Repeated safety lockouts or erratic diagnostic LED flash codes
• Visible burn marks, swollen capacitors, or cracked traces on the board

Shipping & Returns

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