ICP Furnace Control Board Kit for RGS120LTCA0AAA — OEM Ignition Control | Ships Today
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Overview
This genuine OEM control board kit (part number 1183618) is the integrated furnace control for the ICP / Tempstar / Heil RGS120LTCA0AAA. The board is the brain of the furnace: it manages the ignition sequence, sequences the inducer and blower, monitors limit and pressure switches and the flame sensor, and times the gas valve. When the board fails you may see no response to a heat call, blower or inducer that won't start or won't shut off, intermittent lockouts, or diagnostic LED fault codes. Replacing a failed board restores reliable, safety-sequenced operation. The kit includes the board and the hardware needed for a clean swap.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Function | Ignition timing, blower/inducer control, safety monitoring |
| Fits Model | RGS120LTCA0AAA |
| Application | Gas furnace |
Compatibility
Direct OEM replacement for the ICP RGS120LTCA0AAA and the matching Tempstar, Heil, and Comfortmaker furnace platform. Match the board part number and connector layout to your existing control before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter.
- Access — Remove the blower compartment door to expose the control board.
- Document — Photograph every plug and wire harness and note any DIP switch or jumper settings.
- Remove — Unplug each connector, unfasten the board standoffs, and lift the old board out.
- Install — Mount the new board, transfer DIP/jumper settings exactly, and reseat every connector per your photos.
- Test — Restore power, call for heat, and verify the full ignition, burner, and blower sequence with no fault codes.
Signs You Need a Replacement
- No response from the furnace on a heat call
- Blower or inducer won't start, or runs continuously
- Repeated lockouts or flashing diagnostic fault codes
- Burned spots, corrosion, or failed 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