ICP Furnace Control Board Kit for RGS303LRAA0AAAA — OEM 1183618 | Ships Today
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Overview
The ICP control board kit (OEM part 1183618) is the integrated furnace control (IFC) brain of the RGS303LRAA0AAAA gas furnace. It sequences the ignition cycle, manages the inducer and blower, monitors limits and flame proving, and runs the onboard diagnostic LED. When this board fails, the furnace may be completely dead, stuck in lockout, or unable to run the blower or inducer. This OEM kit includes the matched board for a direct, reliable replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V Low Voltage |
| Application | Gas Furnace Ignition & Blower Control |
| Fitment | OEM Replacement |
Compatibility
Designed for the ICP/Tempstar/Heil RGS303LRAA0AAAA gas furnace and related RGS-series units using the 1183618 control kit. Verify the existing board part number and connector layout against your unit before installing.
Installation Guide
- Safety First — Disconnect electrical power and shut off gas; verify zero voltage with a multimeter.
- Access — Remove the furnace control/service panel.
- Document — Photograph every wire harness and terminal connection before disconnecting.
- Remove — Unplug all connectors, remove the mounting screws/standoffs, and lift out the failed board.
- Install — Mount the new board, transfer any jumpers/settings, and reconnect each harness exactly per your photos.
- Test — Restore power and gas, run a full heat cycle, and confirm normal LED status and proper inducer, ignition, and blower sequencing.
Signs You Need a Replacement
- Furnace completely unresponsive on a call for heat
- Blower or inducer motor will not run despite good motors
- Diagnostic LED flashing a hard-fault/board code or no light at all
- Intermittent operation, random resets, or repeated unexplained lockouts
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