ICP Furnace Control Board for RGS303LDFA0AAAA — OEM Kit 1183618 | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is the OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS303LDFA0AAAA gas furnace. The control board governs the entire heating sequence — managing ignition, monitoring the limit and pressure-switch safety circuits, reading the flame sensor, and sequencing the inducer, igniter, gas valve, and blower. A failed board can cause no-heat conditions, repeated lockouts, short cycling, blinking diagnostic fault codes, or a blower that runs nonstop. Installing the correct OEM kit restores safe, reliable, code-compliant operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (KIT CONTROL BOARD) |
| Type | Integrated furnace control board |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RGS303LDFA0AAAA |
| Application | Gas furnace |
| Fitment | OEM direct replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil RGS303LDFA0AAAA gas furnace. Confirm your existing board part number against 1183618 before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
- Access — Remove the furnace blower/control compartment service panel.
- Document — Photograph every wire and connector position on the old board before disconnecting.
- Remove — Unplug the wiring harnesses, remove the mounting screws/standoffs, and lift out the failed board.
- Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, initiate a heat call, and confirm the full ignition sequence and blower operation; check the diagnostic LED for normal status.
Signs You Need a Replacement
- Furnace will not start or repeatedly locks out
- Blinking fault/error code on the control board LED
- Blower runs continuously or fails to energize
- Visible burn marks, corrosion, or cracked 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