ICP Furnace Control Board Kit for RGS120LRAB0AAA — OEM 1183618 | Ships Today
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Overview
This genuine OEM control board kit (part #1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS120LRAB0AAA gas furnace. The board is the brain of the system — it sequences the inducer, igniter, gas valve, and blower, monitors the pressure switch and flame sensor for safe operation, and runs the diagnostic LED fault codes. When a control board fails you typically see dead furnaces, dropped blower stages, ignition lockouts, or erratic LED codes that don't match any single sensor fault.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Function | Ignition, blower, and safety sequencing |
| Diagnostics | On-board LED fault codes |
Compatibility
Direct OEM replacement board kit for the ICP/Tempstar/Heil RGS120LRAB0AAA furnace and shared-platform models. Match the part number and connector layout to your existing board before installing.
Installation Guide
- Safety First — Disconnect power and verify zero voltage with a multimeter.
- Access — Remove the control/blower service panel.
- Document — Photograph every plug and wire harness on the old board before disconnecting.
- Remove — Unplug each harness, release the standoffs/screws, and lift out the failed board.
- Install — Mount the new board and reconnect each harness to its matching connector per your photo.
- Test — Restore power, run a full heat cycle, and confirm a normal LED status code with proper blower and ignition sequencing.
Signs You Need a Replacement
- Furnace completely unresponsive to a heat call
- Blower runs constantly or not at all
- Repeated ignition lockouts with no sensor fault
- Erratic, scrambled, or no LED diagnostic codes
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