ICP Furnace Control Board for RGS303HFFA0AAAA — OEM Kit 1183618 | Ships Today
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Overview
This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP / Tempstar / Heil RGS303HFFA0AAAA gas furnace. The board is the brain of the furnace: it sequences the inducer motor, hot surface igniter, gas valve, and blower; monitors safety limits and pressure switches; manages ignition timing and flame sensing; and flashes diagnostic fault codes through its onboard LED. When the board fails, the entire heating sequence can stall. Typical symptoms include a completely dead furnace with no LED, a blower or inducer that runs continuously, no ignition despite a good igniter, erratic or random short cycling, or scrambled diagnostic codes. Heat damage, surge events, and cracked solder joints are the usual culprits.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Description | Kit, Control Board (Integrated Furnace Control) |
| Type | Integrated Furnace Control |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Fitment | OEM Direct Replacement |
Compatibility
Supplied as the factory replacement control board for the ICP RGS303HFFA0AAAA and the matching Tempstar, Heil, and Comfortmaker models built on the same furnace chassis. Match your existing board's part number and connector layout before installing.
Installation Guide
- Safety First — Disconnect power at the switch and breaker and verify zero voltage with a multimeter; shut off the gas.
- Access — Remove the furnace control/blower compartment panel.
- Document — Photograph every wire harness and terminal position on the old board before unplugging anything.
- Remove — Unplug all connectors, remove the mounting screws/standoffs, and lift out the failed board.
- Install — Seat the new board, reinstall fasteners, and reconnect each harness in the exact position shown in your photos.
- Test — Restore power and gas, run a full heat cycle, and confirm proper ignition, blower operation, and a steady LED with no fault codes.
Signs You Need a Replacement
- Furnace is completely dead with no LED activity.
- Inducer or blower runs nonstop or won't start.
- No ignition even with a known-good igniter and gas valve.
- Random short cycling or scrambled diagnostic flash codes.
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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