ICP Furnace Control Board for RGS303LEAA0AAAA — OEM Kit 1183618 | Ships Today
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Overview
This is the OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS303LEAA0AAAA gas furnace. The control board is the brain of the furnace — it manages the ignition sequence, monitors safety circuits (limit switch, pressure switch, flame sensor), sequences the inducer and blower motors, and coordinates the gas valve and igniter. When this board fails, the furnace may fail to start, lock out, short cycle, throw fault codes on the diagnostic LED, or run the blower continuously. Replacing the board with the correct OEM kit restores reliable, code-compliant operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (KIT CONTROL BOARD) |
| Type | Integrated furnace control board |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RGS303LEAA0AAAA |
| Application | Gas furnace |
| Fitment | OEM direct replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil RGS303LEAA0AAAA gas furnace. Always confirm your existing board part number against 1183618 before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
- Access — Remove the furnace blower/control compartment service panel.
- Document — Photograph every wire and connector position on the old board before disconnecting.
- Remove — Unplug the wiring harnesses, remove the mounting screws/standoffs, and lift out the failed board.
- Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, initiate a heat call, and confirm the full ignition sequence and blower operation; check the diagnostic LED for normal status.
Signs You Need a Replacement
- Furnace will not start or repeatedly locks out
- Blinking fault/error code on the control board LED
- Blower runs continuously or fails to energize
- Visible burn marks, corrosion, or cracked 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