ICP Control Board for RGS243LSFA0AAAA — OEM Furnace Kit 1183618 | Ships Today
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Overview
The OEM 1183618 control board kit is the integrated furnace control (IFC) module for the ICP / Tempstar / Heil RGS243LSFA0AAAA gas furnace. This board orchestrates the entire heating sequence — energizing the inducer motor, hot surface igniter, gas valve, and blower while monitoring the pressure switch, flame sensor, and limit switches. It also powers the 24V control circuit and displays diagnostic LED fault codes for troubleshooting. A failed board commonly leaves the furnace dead, stuck in lockout, running the blower nonstop, or shutting down on a false safety trip. Burned relays, scorched terminals, and a failed microprocessor are the usual culprits.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (KIT CONTROL BOARD) |
| Type | Integrated Furnace Control Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Application | Gas Furnace |
| Fitment | OEM Replacement |
Compatibility
Engineered as a direct OEM fit for the ICP RGS243LSFA0AAAA furnace and other ICP-family models originally shipped with control board kit 1183618. Verify your existing board's part number against the OEM number before ordering to confirm an exact match.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace blower-compartment service panel.
- Document — Photograph every wire and connector on the existing board before disconnecting.
- Remove — Label and unplug each harness, remove the mounting screws/standoffs, and lift out the old board.
- Install — Mount the new 1183618 board, reconnect each harness exactly per your photos, and match all jumpers/DIP switch settings.
- Test — Restore power and run a full heat cycle; confirm proper ignition, blower timing, and no fault codes on the diagnostic LED.
Signs You Need a Replacement
- Furnace will not ignite or repeatedly locks out
- Blower runs continuously or fails to start
- Diagnostic LED is dark, frozen, or flashing a hard fault
- Visible burnt traces, melted relays, or scorched terminals on the old board
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days