ICP Furnace Control Board Kit for RGS300STAA0AAAA — OEM 1183618 | Ships Today
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Overview
This is the genuine OEM control board kit, ICP part number 1183618, for the RGS300STAA0AAAA gas furnace. The integrated furnace control board is the brain of the system: it manages the ignition sequence, sequences the inducer and blower, monitors safety circuits (limit switches, flame sense, pressure switch), and times the heat and cool cycles. As a kit, 1183618 typically includes the board plus the mounting hardware and harness/adapter needed for a complete replacement. Control boards fail from voltage surges, heat stress, cracked solder joints, failed relays on the board, and burned terminals. Symptoms of a failing board include no response on a call for heat, blower or inducer that won't start or won't stop, repeated ignition lockouts, and erratic fault-code flashing on the diagnostic LED. Replacing the board restores correct, safe sequencing of the entire furnace.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Includes | Control board + mounting/harness kit |
| Fit | OEM Direct Replacement |
Compatibility
Direct fit for ICP / Tempstar / Heil / Comfortmaker model RGS300STAA0AAAA and related furnaces that specify control board kit 1183618. Verify the part number printed on your existing board before ordering, as control boards are model-specific.
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 wire harness and terminal on the existing board before disconnecting.
- Remove — Unplug each harness, release any low-voltage screw terminals, and unfasten the old board from its standoffs.
- Install — Mount the new board using the included hardware and reconnect every harness exactly per your photo.
- Test — Restore power, run heat and cool cycles, and confirm correct sequencing with no fault-code flashes on the diagnostic LED.
Signs You Need a Replacement
- No response from the furnace on a call for heat
- Blower or inducer won't start, or won't shut off
- Repeated ignition lockouts with no other failed component
- Burned terminals, scorch marks, or erratic diagnostic LED codes
Shipping & Returns
Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. 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