ICP Furnace Control Board Kit for RGS120HDCA0AAA — OEM Replacement | Ships Today
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Overview
This OEM control board kit (part 1183618) for the ICP / Tempstar / Heil RGS120HDCA0AAA is the integrated furnace control (IFC) that manages the entire heating and blower sequence. The board reads the thermostat call, energizes the inducer, monitors the pressure switch, powers the hot surface igniter, opens the gas valve, proves flame, and times the blower on and off. It also runs the furnace's safety logic and flashes diagnostic fault codes via its onboard LED. When this board fails, symptoms range from no response at all to intermittent lockouts, blower problems, or repeated ignition faults. Supplied as a kit, it includes the board and the mounting/connection hardware needed to drop it into the RGS120HDCA0AAA control box.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition, blower & safety sequencing with diagnostics |
| Fitment | OEM for RGS120HDCA0AAA |
Compatibility
Designed for the ICP / Tempstar / Heil / Comfortmaker RGS120HDCA0AAA gas furnace and related RGS-series models using the same integrated furnace control. Match the kit part number to your original board before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and furnace switch, then verify zero voltage with a multimeter.
- Access — Remove the furnace control-compartment service panel.
- Document — Photograph every connector and wire location on the old board before disconnecting; note the LED fault-code chart.
- Remove — Unplug each harness connector, remove the board mounting screws/standoffs, and lift out the old board.
- Install — Mount the new board on the included hardware and transfer each connector to the matching position per your photo. Set any jumpers/DIP switches to match the original.
- Test — Restore power, run a full heat cycle, and confirm correct ignition, blower timing, and a normal (no-fault) LED status.
Signs You Need a Replacement
- Furnace completely unresponsive to a heat call
- Repeated lockouts or erratic fault codes on the board LED
- Blower won't start, won't stop, or cycles incorrectly
- Visible burn marks, corrosion, or a blown fuse on the board
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. 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