ICP Furnace Control Board Kit for RGS300LEAA0AAAA — OEM 1183618 | Ships Today
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Overview
This genuine OEM control board kit (part number 1183618) fits the ICP / Tempstar / Heil RGS300LEAA0AAAA gas furnace. The integrated furnace control board is the brain of the unit — it manages the ignition sequence, sequences the inducer and blower, monitors safety limits and flame sensing, and times every heat and cool cycle. When the board fails from voltage surges, corrosion, burned relays, or cracked solder joints, the furnace may not respond to the thermostat, may lock out, or may behave erratically. This complete OEM kit replaces the board with the exact firmware and relay configuration your system requires.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Description | Kit, Control Board |
| Type | Integrated Furnace Control Board |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RGS300LEAA0AAAA |
| Fitment | Genuine OEM |
Compatibility
Direct-fit replacement for the ICP / Tempstar / Heil RGS300LEAA0AAAA and other RGS300 family furnaces specifying OEM control board kit 1183618. Match the board part number and connector layout to your existing control before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the blower/control compartment service panel.
- Document — Photograph every wire harness and connector on the old board before disconnecting — this is critical for control boards.
- Remove — Unplug each connector, release the mounting standoffs or screws, and lift out the old board.
- Install — Mount the new board and reconnect every harness exactly per your photos; confirm any DIP switch or jumper settings match the original.
- Test — Restore power, run a full heat and cool cycle, and confirm the inducer, igniter, and blower sequence correctly with no fault codes.
Signs You Need a Replacement
- Furnace is completely unresponsive to the thermostat
- No inducer, igniter, or blower activation on a heat call
- Persistent fault/error code or continuous lockout
- Visible burned relays, scorch marks, 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