ICP Furnace Control Board Kit for RGS303SSAA0AAAA — OEM 1183618 | Ships Today
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Overview
This is a genuine OEM control board kit, part number 1183618, for ICP, Tempstar, and Heil gas furnaces. The integrated furnace control board is the brain of the system: it sequences ignition, manages the inducer and blower motors, monitors safety devices such as the pressure switch and limit, controls timing for fan-on and fan-off delays, and flashes diagnostic fault codes through its onboard LED. When the board fails the furnace may go completely dead, fail to ignite, leave the blower running continuously, or throw erratic and inconsistent fault codes. Supplied as a kit, this OEM board includes the components needed for a correct, reliable replacement so the furnace returns to proper sequencing and safe operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil OEM |
| Application | Gas Furnace Control |
| Fitment | OEM Replacement |
Compatibility
Engineered as the factory replacement control board kit for the ICP Tempstar Heil RGS303SSAA0AAAA gas furnace. ICP uses this board across related furnace models; match your existing board part number and connector layout before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the blower-compartment service panel to expose the control board.
- Document — Photograph every harness connector and wire location before disconnecting; connectors are keyed but labeling prevents errors.
- Remove — Unplug each harness, release the board from its standoffs or screws, and lift it out.
- Install — Mount the new board, then seat each harness connector firmly in its matching port per your photo.
- Test — Restore power, run a full heat cycle, and confirm correct ignition, blower timing, and a steady status LED with no fault codes.
Signs You Need a Replacement
- Furnace is completely unresponsive with no status LED
- No ignition sequence despite a valid call for heat
- Blower runs continuously or fails to start
- Erratic, inconsistent, or unexplained diagnostic fault 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