ICP Control Board for RGS303HEEA0AAAA — Furnace Control Board Kit | Ships Today
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Overview
This genuine OEM control board kit (part 1183618) is the brain of the ICP / Tempstar / Heil RGS303HEEA0AAAA gas furnace. The integrated furnace control manages the entire heat sequence — energizing the inducer, proving pressure, firing the igniter, opening the gas valve, monitoring flame, and timing the blower on and off. It also runs safety lockouts and flashes diagnostic fault codes. When the board fails, the furnace may be completely dead, stuck in lockout, blow cold air, or behave erratically. The kit includes the matched board and mounting hardware for a clean OEM replacement, restoring proper sequencing and full diagnostic capability.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24 VAC |
| Application | Gas Furnace Sequencing & Safety |
| Fitment | OEM Direct Replacement Kit |
Compatibility
Direct-fit replacement for the ICP, Tempstar, Heil, and Comfortmaker RGS303HEEA0AAAA furnace and related RGS303 series units using the same integrated control. Verify the board layout, connectors, and part number against your original before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/blower compartment service panel.
- Document — Photograph every plug, terminal, and wire color on the old board before disconnecting.
- Remove — Unplug each harness and the line/24V connections, then unscrew the failed board from its standoffs.
- Install — Mount the new board, transfer any jumpers/links, and reconnect every harness exactly per your photos.
- Test — Restore power, call for heat, and confirm the full inducer-igniter-gas-blower sequence and clear diagnostic LED.
Signs You Need a Replacement
- Furnace is completely unresponsive with no diagnostic LED
- Repeated lockouts or erratic, out-of-sequence operation
- Blower or inducer runs continuously or never starts
- Burnt spots, scorched traces, or relays buzzing 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