ICP Furnace Control Board Kit for RGS120STCA0AAA — OEM Integrated Control | Ships Today
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Overview
This genuine OEM control board kit (part 1183618) fits the ICP / Tempstar / Heil RGS120STCA0AAA gas furnace. The integrated furnace control board is the brain of the furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower, monitors safety devices like the limit and pressure switches, and runs flame-sense logic and ignition lockout. Supplied as a complete kit with the mounting and connector hardware needed for a clean swap. A failed board causes a wide range of faults: no response on a heat call, the inducer or blower not running, erratic cycling, or repeated lockouts. The onboard diagnostic LED flashes fault codes to confirm the board — rather than a downstream component — has failed.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated furnace control board kit |
| Brand | ICP / Tempstar / Heil |
| Line Voltage | 120V |
| Control Voltage | 24V |
| Fits Model | RGS120STCA0AAA |
| Fitment | OEM replacement |
Compatibility
Engineered for the ICP-family RGS120STCA0AAA 120,000 BTU gas furnace and related models using the same integrated control. Sold under Tempstar, Heil, Comfortmaker, and other ICP brands. Match the OEM board number and connector layout to your existing board before ordering.
Installation Guide
- Safety First — Disconnect power and shut off gas; verify zero voltage with a multimeter.
- Access — Remove the furnace control-compartment access door.
- Document — Photograph every wire harness and connector position before unplugging anything.
- Remove — Unplug the harnesses, remove the board's mounting screws, and lift out the old board.
- Install — Mount the new board, transfer connectors one at a time to the matching terminals per your photos, and verify the harness routing.
- Test — Restore gas and power, run a full heat cycle, and confirm proper ignition, blower operation, and a steady (no-fault) diagnostic LED.
Signs You Need a Replacement
- No response at all on a call for heat
- Inducer or blower motor won't energize
- Erratic short-cycling or random shutdowns
- Diagnostic LED flashing a board/internal fault code
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