ICP Furnace Control Board Kit for RGS120HDBA0AAA Gas Furnace | Ships Today
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Overview
This OEM control board kit (part #1183618) is the integrated furnace control (IFC) brain of the ICP / Tempstar / Heil RGS120HDBA0AAA gas furnace. It sequences the entire heat cycle—inducer start, pressure-switch proving, hot-surface igniter warm-up, gas valve energizing, flame sensing, and blower on/off timing—while monitoring all safety limits. The board carries the 24 VAC thermostat circuit and the diagnostic LED that flashes fault codes. When this board fails you typically see a completely dead furnace, no inducer or blower operation, intermittent no-heat calls, or a blank/erratic diagnostic LED. Supplied as a kit with mounting hardware and instructions for a direct OEM replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24 VAC |
| Line Voltage | 120 VAC |
| Fits Model | RGS120HDBA0AAA |
Compatibility
Designed for the ICP family RGS120HDBA0AAA gas furnace and shared across compatible ICP, Tempstar, Heil, Comfortmaker, and Arcoaire RGS-series furnaces. Confirm the printed board part number against 1183618 before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
- Access — Remove the blower-compartment service panel.
- Document — Photograph every wire and connector position on the board before disconnecting anything.
- Remove — Label and unplug each harness, remove the board mounting screws, and lift out the old board.
- Install — Mount the new board, transfer all connectors exactly per your photo, and set any heat/cool timing jumpers to match the original.
- Test — Restore power and run a full heat cycle; confirm normal sequencing and a steady diagnostic LED.
Signs You Need a Replacement
- Furnace is completely unresponsive to the thermostat.
- Inducer or blower will not start, or runs at the wrong time.
- Diagnostic LED is dead, or flashes a hard board/internal fault code.
- Intermittent no-heat episodes that clear after a power reset.
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