ICP Furnace Control Board for RGS300LSEA0AAAA — OEM Kit 1183618 | Ships Today
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Overview
The OEM Control Board Kit (part number 1183618) is the integrated electronic control that manages every operating sequence of your ICP Tempstar Heil RGS300LSEA0AAAA gas furnace. It governs ignition timing, blower and inducer relay logic, safety lockouts, and flame verification. When this board fails, the furnace may fail to ignite, short-cycle, lock out repeatedly, run the blower continuously, or flash diagnostic fault codes on its onboard LED. Because it is the brain of the system, a faulty board can mimic the symptoms of many other failed components, so verifying it directly saves time and unnecessary parts swaps. This factory kit includes the board and required mounting hardware for a direct, plug-in replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Description | Kit, Control Board |
| Type | Integrated Furnace Control |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Fits Model | RGS300LSEA0AAAA |
| Fitment | OEM Direct Replacement |
Compatibility
This board kit is engineered specifically for the ICP Tempstar Heil RGS300LSEA0AAAA furnace and related RGS300-series gas furnaces built on the same control platform. Always match your existing board's part number or markings before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace blower-compartment service panel.
- Document — Photograph every wire and connector position before disconnecting anything.
- Remove — Unplug each harness, release the board mounting clips/screws, and lift out the old control board.
- Install — Mount the new board on the supplied standoffs and reconnect every harness exactly per your photo.
- Test — Restore power, start a heat cycle, and confirm proper ignition, blower operation, and absence of fault codes.
Signs You Need a Replacement
- Furnace will not ignite or repeatedly locks out
- Blower or inducer motor runs constantly or not at all
- Flashing error/diagnostic codes on the board LED
- Visible burn marks, scorching, or corrosion 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