ICP Furnace Control Board Kit for RGS303SFAA0AAAA — OEM | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM control board kit (ICP part #1183618) is the integrated furnace control (IFC) that manages your RGS303SFAA0AAAA system's entire heating sequence — ignition timing, gas valve and inducer operation, blower fan on/off delays, safety interlocks, and diagnostic fault codes. The board reads inputs from the thermostat, pressure switch, limit switches, and flame sensor, then sequences each component safely. When a control board fails you may see a completely dead furnace, blower or inducer that won't run, flashing diagnostic LED fault codes, or intermittent no-heat events. Supplied as a complete kit, this OEM control board includes the correct firmware and connector layout for your unit, restoring reliable, code-correct operation without the guesswork of a universal board.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Heil / Tempstar / Comfortmaker |
| Application | Gas Furnace Control |
| Fit | OEM Replacement Kit |
Compatibility
Factory replacement control board kit for ICP / Tempstar / Heil model RGS303SFAA0AAAA and related ICP-family furnaces using this integrated furnace control. Confirm OEM number 1183618 and the connector/terminal layout against your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter; shut off the gas.
- Access — Remove the blower/service panel to reach the control board.
- Document — Photograph every connector, plug, and wire position before disconnecting anything.
- Remove — Unplug the harness connectors, release the board from its standoffs/mounting screws, and remove it.
- Install — Mount the new board, transfer any jumpers/links, and reconnect every connector exactly per your photo.
- Test — Restore gas and power, run a full heat cycle, and verify the diagnostic LED shows normal operation.
Signs You Need a Replacement
- Furnace completely dead with no LED activity
- Flashing diagnostic fault/error codes
- Blower or inducer won't run, or runs continuously
- Intermittent no-heat or random lockouts
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