ICP Furnace Control Board for RGS120STBB0AAA — OEM Kit 1183618 | Ships Today
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Overview
This is a genuine OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS120STBB0AAA gas furnace. The control board is the brain of your furnace — it sequences the entire heating cycle, managing the inducer motor, hot surface igniter, gas valve, blower relay, and 24V control signals from the thermostat. It continuously monitors safety inputs such as the pressure switch and limit switches before allowing ignition. When a control board fails, the furnace may not respond to thermostat calls, may short-cycle, or may lock out entirely. Replacing it with the correct OEM board restores reliable, code-compliant operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Application | Gas Furnace |
| Fit | OEM Replacement |
Compatibility
Engineered as a direct-fit replacement for the ICP Tempstar Heil RGS120STBB0AAA furnace and closely related RGS120 series gas furnaces sharing the same control platform. Always confirm the part number on your existing board before ordering, as ICP used several board revisions across production years.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace blower-compartment service panel.
- Document — Photograph every wire and connector on the existing board before disconnecting anything.
- Remove — Label and unplug each harness, remove the board mounting screws, and lift out the old control board.
- Install — Mount the new board on the same standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, call for heat, and confirm a full ignition sequence and proper blower operation.
Signs You Need a Replacement
- Furnace does not respond to a thermostat call for heat.
- Blower or inducer runs continuously or not at all.
- Repeated lockouts or flashing diagnostic fault codes.
- Visible burnt traces, scorch marks, or a failed onboard relay or fuse.
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