ICP Furnace Control Board Kit for RGS120LDCA0AAA — OEM 1183618 | Ships Today
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Overview
This genuine OEM control board kit (part #1183618) is the integrated furnace control (IFC) brain of the ICP/Tempstar/Heil RGS120LDCA0AAA. It manages the entire heating sequence — igniter timing, gas valve operation, inducer and blower control, flame sensing, safety lockouts, and diagnostic fault codes. When the board fails you may see no response on a call for heat, a furnace stuck in lockout, an inducer or blower that won't run or won't stop, erratic short-cycling, or a blank/flashing diagnostic LED. The kit includes the board and mounting hardware for a complete replacement that restores correct, safe operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition, blower, inducer & safety control |
| Diagnostics | Onboard LED fault codes |
| Fits Model | RGS120LDCA0AAA |
| Fitment | OEM direct replacement |
Compatibility
Direct replacement for the ICP RGS120LDCA0AAA and shared-platform Tempstar, Heil, Comfortmaker, and Arcoaire furnaces using this integrated control. Match the board part number and connector layout to your existing board before installing.
Installation Guide
- Safety First — Disconnect power to the furnace. Verify zero voltage with a multimeter.
- Access — Remove the blower/control compartment panel to expose the board.
- Document — Photograph every connector and wire location before unplugging anything.
- Remove — Unplug each harness, release the board from its standoffs/mounting screws, and lift it out.
- Install — Mount the new board with the included hardware and reconnect each harness to the matching terminal per your photos.
- Test — Restore power, run a full heat cycle, and confirm proper ignition, blower operation, and a normal diagnostic LED.
Signs You Need a Replacement
- No response from the furnace on a call for heat
- Repeated lockouts or flashing fault codes
- Inducer or blower won't start, or won't shut off
- Erratic short-cycling or burnt spots 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