ICP Integrated Furnace Control Board for RGS120HFAB0AAA — OEM Kit 1183618 | Ships Today
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Overview
The OEM Integrated Furnace Control Board Kit (part number 1183618) is the electronic brain of your ICP Tempstar/Heil RGS120HFAB0AAA gas furnace. It manages the ignition sequence, monitors the flame sensor and pressure switches, controls the inducer and blower motors, and runs the safety lockout logic. When this board fails, the furnace will not start, may short-cycle, lock out after several ignition attempts, or show fault codes on its diagnostic LED. This is a complete factory kit supplied with the correct firmware and connectors for a direct, plug-in replacement — no rewiring required.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V |
| Application | Gas Furnace |
| Fitment | OEM Direct Replacement |
Compatibility
Engineered specifically for the ICP Tempstar/Heil RGS120HFAB0AAA furnace and other ICP-family models that call out part 1183618. Always verify the part number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the blower/control compartment door.
- Document — Photograph every wire and connector on the old board before disconnecting anything.
- Remove — Unplug all harness connectors, then unscrew the failed control board from its standoffs.
- Install — Mount the new board, reconnect each harness exactly per your photo, and confirm all plugs are fully seated.
- Test — Restore power and run a full heat cycle, watching the diagnostic LED for normal operation.
Signs You Need a Replacement
- Furnace fails to ignite or locks out after repeated attempts
- Blower or inducer motor will not energize
- Diagnostic LED flashes a hard-lockout or board fault code
- Visible burn marks, swollen relays, or scorched traces 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