ICP Control Board Kit for RGS120HDBB0AAA — OEM 1183618 Furnace Board | Ships Today
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Overview
This is the genuine OEM control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS120HDBB0AAA gas furnace. The integrated furnace control board is the brain of the system — it manages the ignition sequence, monitors safety circuits (limits, pressure switch, flame sensor), sequences the inducer and blower motors, and controls the gas valve. When this board fails, the furnace will typically stop responding to the thermostat, lock out on ignition, short-cycle, or run the blower continuously. A failed board often shows a diagnostic LED fault code, no LED at all, or scorched/burnt traces near the relays.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RGS120HDBB0AAA |
| Fit | OEM Replacement |
| Includes | Control board + mounting hardware kit |
Compatibility
Designed as the direct OEM replacement for the ICP/Tempstar/Heil RGS120HDBB0AAA furnace. This kit also services many closely related RGS-series gas furnaces that originally shipped with the 1183618 board. Always confirm your existing board part number or furnace serial number before ordering.
Installation Guide
- Safety First — Disconnect power to the furnace at the service switch and breaker. Verify zero voltage with a multimeter before touching the board.
- Access — Remove the furnace blower-compartment service panel to expose the control board.
- Document — Photograph every wire and connector position on the old board before disconnecting anything.
- Remove — Unplug the wiring harnesses and spade terminals, then remove the board mounting screws/standoffs and lift the old board out.
- Install — Mount the new 1183618 board on the supplied standoffs and reconnect every harness exactly per your photos.
- Test — Restore power, set the thermostat to call for heat, and verify the full ignition sequence: inducer, igniter, gas valve, flame, and blower.
Signs You Need a Replacement
- Furnace does not respond to thermostat heat calls
- Ignition lockout or repeated failed ignition attempts
- Blower runs constantly or won't start
- No diagnostic LED, error flash codes, or visible burnt traces/relays on the board
Shipping & Returns
Ships same day on orders placed 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