ICP Furnace Control Board Kit for RGS120LFAB0AAA — OEM Ignition Control | Ships Today
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Overview
This is the genuine OEM furnace control board kit (part 1183618) for the ICP/Tempstar/Heil RGS120LFAB0AAA gas furnace. The integrated control board is the brain of the furnace: it sequences the entire heating cycle — energizing the inducer, proving the pressure switch, powering the hot surface igniter, opening the gas valve, monitoring the flame sensor, and timing the blower on and off. It also enforces the safety circuit, locking out the furnace if any limit, rollout, or flame condition is unsafe. Because the board ties every component together, a failed board can mimic many other faults. Common symptoms include a completely dead furnace with no response to a heat call, an igniter or inducer that never energizes, blower timing that runs constantly or not at all, error codes flashing on the diagnostic LED, and intermittent no-heat that comes and goes with heat or vibration. The kit includes the replacement board ready for field installation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition sequencing, blower timing, safety control |
| Diagnostics | On-board LED fault codes |
| Fitment | OEM direct replacement |
Compatibility
Engineered for the ICP RGS120LFAB0AAA gas furnace and related Tempstar, Heil, Comfortmaker, and ICP models that use this integrated control. Match the board part number and connector layout to your existing board before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/blower panel to reach the board.
- Document — Photograph every wire harness and connector, or transfer leads one at a time to avoid mistakes.
- Remove — Unplug all harnesses, remove the board mounting screws or standoffs, and lift out the old board.
- Install — Mount the new board, reseat each connector in its matching plug per your photos, and confirm all are fully latched.
- Test — Restore power, run a full heat cycle, and verify proper ignition, flame sensing, and blower timing with no fault codes.
Signs You Need a Replacement
- Furnace is completely unresponsive to a heat call
- Igniter, inducer, or blower never energizes in sequence
- Diagnostic LED flashing a board or sequence fault code
- Intermittent no-heat that changes with vibration or temperature
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