ICP Furnace Control Board Kit for RGS120LSBA0AAA | Ships Today
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Overview
This is the genuine OEM control board kit (part #1183618) for the ICP / Tempstar / Heil RGS120LSBA0AAA gas furnace. The integrated furnace control board is the brain of the appliance: it sequences the inducer, igniter, gas valve, and blower, monitors the flame sensor and pressure/limit switches, and provides diagnostic fault codes via its onboard LED. When the board fails, the furnace can become completely unresponsive, behave erratically, short-cycle, or refuse to advance through the ignition sequence even though every individual component tests good.
Common failure symptoms include no response to a call for heat, a dead diagnostic LED, blower or inducer that runs continuously or not at all, and erratic relay chatter. Power surges, moisture, and aged relays are the usual causes. Replacing with the OEM kit restores the correct timing and safety logic the furnace was engineered around.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RGS120LSBA0AAA |
| Diagnostics | Onboard LED fault codes |
| Application | Gas furnace control |
Compatibility
Direct OEM replacement for the ICP/Tempstar/Heil RGS120LSBA0AAA gas furnace and other ICP-family furnaces that originally used board 1183618. Confirm the kit's harness and jumper configuration against your existing board before installing.
Installation Guide
- Safety First – Disconnect power at the furnace switch and verify zero voltage with a multimeter.
- Access – Remove the blower/control-compartment service panel.
- Document – Photograph every wire and connector position on the old board before disconnecting anything.
- Remove – Unplug all connectors, note any jumper or dip-switch settings, and unscrew the old board from its standoffs.
- Install – Mount the new board, transfer jumper/dip settings, and reconnect every harness exactly per your photos.
- Test – Restore power, initiate a heat call, and verify the full ignition sequence and blower operation; confirm no fault codes on the LED.
Signs You Need a Replacement
- Furnace does not respond to a call for heat.
- Diagnostic LED is dead or flashing a board-fault code.
- Inducer or blower runs continuously or never starts.
- Relay chatter or erratic, intermittent operation.
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