ICP Control Board Kit for RGS300SREA0AAAA — OEM 1183618 | Ships Today
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Overview
This is the genuine OEM control board kit (ICP part number 1183618) for the ICP / Tempstar / Heil RGS300SREA0AAAA furnace. The integrated furnace control board is the brain of the system — it manages the ignition sequence, monitors safety devices, sequences the inducer, igniter, gas valve, and blower, and reports fault codes through its diagnostic LED. When the board fails, symptoms range from a completely dead furnace to erratic operation, blower or inducer that will not run, repeated lockouts, or flashing diagnostic codes. Because it ties every furnace function together, always confirm the failure with diagnostic codes and basic checks before replacing the board. This kit supplies the OEM board and the hardware needed for installation.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Includes | Control board and mounting hardware |
| Application | Gas furnace control |
Compatibility
Fits the ICP / Tempstar / Heil RGS300SREA0AAAA and related ICP-family furnaces specifying OEM control board kit 1183618. Confirm the board part number and connector layout match your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service panel to expose the control board.
- Document — Photograph every connector and wire harness position before disconnecting; this is critical for a multi-connector board.
- Remove — Unplug each harness, remove the board mounting screws or standoffs, and lift out the old board.
- Install — Mount the new board, then reconnect every harness to the matching connector per your photos.
- Test — Restore power and verify a normal startup sequence — inducer, igniter, flame, then blower — with no fault codes.
Signs You Need a Replacement
- Furnace completely dead with no diagnostic LED
- Repeated lockouts or erratic, inconsistent operation
- Blower or inducer will not run despite good components
- Persistent or nonsensical fault codes after other parts check out
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