ICP Integrated Furnace Control Board for RGS120LSBB0AAA — Kit 1183618 | Ships Today
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Overview
The ICP OEM Control Board Kit (part number 1183618) is the integrated furnace control (IFC) for the ICP/Tempstar/Heil RGS120LSBB0AAA gas furnace. This board is the brain of the furnace — it sequences the inducer motor, hot surface igniter, gas valve, and blower, while continuously monitoring flame sense, pressure switches, and limit switches for safe operation. When the control board fails, the furnace may not respond to a thermostat call, lock out after a few ignition attempts, run the blower continuously, or throw diagnostic flash-code faults. This is a complete OEM kit, supplied with the correct firmware/timings for this furnace family so the ignition sequence matches factory spec.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control (Kit) |
| Brand | ICP (Tempstar / Heil) |
| Function | Ignition, blower & safety sequencing |
| Diagnostics | On-board fault flash codes |
| Fit | OEM direct replacement |
Compatibility
Designed as a direct OEM replacement for the ICP/Tempstar/Heil RGS120LSBB0AAA gas furnace. Always confirm the printed part number on your existing board (1183618) before ordering, as several visually similar boards exist across this furnace platform.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter at the board terminals.
- Access — Remove the furnace blower-compartment service panel.
- Document — Photograph every wire harness and the ribbon/connector positions before disconnecting anything.
- Remove — Unplug all connectors, remove the mounting screws/standoffs, and lift out the old control board.
- Install — Mount the new board, transfer any jumper/dip settings, and reconnect each harness exactly per your photos.
- Test — Restore power, initiate a heat call, and confirm a clean ignition sequence with no fault codes.
Signs You Need a Replacement
- No response to a thermostat heat call
- Repeated ignition lockouts or flashing diagnostic fault codes
- Blower runs constantly or won't start
- Intermittent operation, burning smell, or visible scorching 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