ICP Furnace Control Board Kit for RGS303LTFA0AAAA — OEM 1183618 | Ships Today
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Overview
This is a genuine OEM control board kit, part number 1183618, for ICP / Tempstar / Heil RGS303LTFA0AAAA gas furnaces. The integrated furnace control board is the brain of the appliance: it sequences ignition, manages blower and inducer timing, monitors safety inputs such as limit and pressure switches, and communicates faults through its diagnostic LED. When the board fails, the furnace can exhibit a wide range of symptoms — no response to the thermostat, blower or inducer running constantly, intermittent ignition, or flashing fault codes that point back to the board itself. This kit supplies the correct OEM control along with the hardware needed for a proper replacement, restoring reliable, code-correct operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Application | Gas Furnace Control |
| Fitment | OEM Replacement Kit |
Compatibility
Engineered as a direct OEM replacement for the ICP RGS303LTFA0AAAA furnace and shared across compatible RGS-series Tempstar, Heil, and Comfortmaker gas furnace platforms. Confirm the original board part number and connector layout before installing, and transfer any jumper or DIP-switch settings to match your system configuration.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the control/blower compartment service panel.
- Document — Photograph every harness connector, wire color, and jumper setting on the old board before disconnecting.
- Remove — Unplug each connector, remove the mounting screws, and lift out the failed board.
- Install — Mount the new board, match any jumper/DIP settings, and reconnect each harness to its keyed connector per your photo.
- Test — Restore power and run a full heat cycle, confirming the diagnostic LED shows normal operation with no fault codes.
Signs You Need a Replacement
- Furnace is completely unresponsive to the thermostat
- Blower or inducer runs continuously or won't start
- Diagnostic LED flashes a control-board fault code
- Visible burn marks, corrosion, or scorched 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