ICP Control Board Kit for RGS303LFEA0AAAA — OEM Furnace Control 1183618 | Ships Today
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Overview
This is a genuine OEM control board kit (part number 1183618) for the ICP/Tempstar/Heil RGS303LFEA0AAAA gas furnace. The integrated furnace control board governs the entire heat cycle — ignition timing, inducer and blower operation, safety limit monitoring, and diagnostic fault reporting. When it fails, the furnace may not respond to a heat call, may lock out after failed ignition attempts, may run the blower nonstop, or may flash an error code on its diagnostic LED. As the central controller, a failed board is among the most common causes of a furnace that stops heating. This kit ships complete and ready to install.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Fits Model | RGS303LFEA0AAAA |
| Fit | OEM Replacement |
| Application | Gas Furnace |
Compatibility
Designed as a direct OEM fit for the ICP/Tempstar/Heil RGS303LFEA0AAAA gas furnace. ICP-family brands (Heil, Tempstar, Comfortmaker, Arcoaire, KeepRite) share many components, so this board (part 1183618) may also service related RGS-series models — always verify your existing board part number before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter at the board terminals.
- Access — Remove the furnace front service panel to expose the control board.
- Document — Photograph every wire and connector position before disconnecting anything.
- Remove — Unplug the molex harnesses and low-voltage leads, release the board mounting standoffs/screws, and lift the old board out.
- Install — Mount the new 1183618 board on the standoffs and reconnect every harness exactly per your photos.
- Test — Restore power, initiate a heat call, and confirm proper ignition, blower, and inducer operation with no fault codes.
Signs You Need a Replacement
- Furnace will not ignite or has no response to a thermostat call for heat.
- Blower or inducer motor runs continuously or fails to start.
- Repeated ignition lockouts or a flashing diagnostic fault code on the board LED.
- Visible burn marks, corrosion, or cracked solder/relays on the 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