ICP Furnace Control Board for RGS240HTFA0AAAA — OEM Kit 1183618 | Ships Today

Overview

This is the genuine OEM control board kit (part number 1183618) for the ICP/Tempstar/Heil RGS240HTFA0AAAA gas furnace. The integrated furnace control board orchestrates the entire heating sequence — it powers the inducer, energizes the hot surface igniter, opens the gas valve, monitors flame and safety limits, and times the blower on and off delays. A failed board can leave the furnace dead to thermostat calls, stuck in lockout, short cycling, or blowing cold air. Diagnostic LED fault codes that won't clear, or relays that won't energize the inducer or blower, point to board failure. This kit arrives configured for your model with the required mounting hardware for a clean swap.

Specifications

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil RGS240HTFA0AAAA furnace. As a Comfortmaker-family component, the 1183618 kit also serves several related RGS-series models — always confirm your existing board part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter before touching terminals.
2. Access — Remove the furnace blower-compartment service panel.
3. Document — Photograph every harness connector on the old board before disconnecting.
4. Remove — Unplug the connectors, remove the screws/standoffs, and lift out the failed board.
5. Install — Mount the new 1183618 board and reconnect each harness exactly per your photo.
6. Test — Restore power, run a call for heat, and confirm the inducer, igniter, gas valve, and blower sequence correctly with a steady diagnostic LED.

Signs You Need a Replacement

• Furnace unresponsive to thermostat calls for heat
• Persistent fault LED that won't clear
• Inducer or blower relay fails to energize
• Short cycling or cold-air blowing with no other fault found

Shipping & Returns

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