ICP Furnace Control Board Kit for RGS120HFCA0AAA — OEM Replacement | Ships Today
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Overview
This OEM control board kit (part #1183618) is the integrated furnace control (IFC) — the brain of your ICP/Tempstar/Heil RGS120HFCA0AAA furnace. It manages the entire heating sequence: it receives the thermostat call, runs the inducer and pressure-switch proof, energizes the hot surface igniter, opens the gas valve, monitors flame via the sensor, and controls blower timing and safety lockouts. When the control board fails, the furnace may not respond to the thermostat, may short-cycle, or may flash diagnostic fault codes through its onboard LED. Because the board orchestrates every safety interlock, a failed board is a no-heat condition that cannot be safely bypassed. This kit ships as a complete OEM assembly so the board matches your furnace's ignition and blower logic exactly.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition, blower, and safety sequencing |
| Diagnostics | Onboard LED fault codes |
| Fits Model | RGS120HFCA0AAA |
Compatibility
Direct OEM replacement for the ICP Tempstar Heil RGS120HFCA0AAA gas furnace. Control board kit 1183618 is the specified IFC for this platform and related ICP-family furnaces using the same control sequence. Confirm your board's connector layout and part number against 1183618 before installing.
Installation Guide
- Safety First — Disconnect power at the breaker, shut off gas, and verify zero voltage with a multimeter.
- Access — Remove the furnace control-compartment service panel.
- Document — Photograph every wire harness and connector position on the old board before unplugging anything.
- Remove — Unplug each harness, release the board standoffs/screws, and lift out the old control board.
- Install — Mount the new board on the standoffs and reconnect each harness to its matching connector per your photos.
- Test — Restore gas and power, start a heat cycle, and confirm the board runs the full inducer → igniter → gas → flame → blower sequence with no fault codes.
Signs You Need a Replacement
- Furnace does not respond to thermostat calls for heat
- Repeated lockouts or LED diagnostic fault codes
- Blower or inducer runs erratically or won't start
- Visible burn marks, corrosion, or cracked relays on the board
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