ICP Furnace Control Board Kit for RGS090SEAB0AAA — OEM 1183618 | Ships Today
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Overview
This OEM control board kit (part 1183618) is the integrated furnace control (IFC) — the "brain" of the ICP / Tempstar / Heil RGS090SEAB0AAA gas furnace. It manages the entire heating sequence: it reads the thermostat call, runs the inducer and pressure-switch proof, energizes the hot surface igniter, opens the gas valve, monitors the flame sensor, and times the blower on and off. It also coordinates cooling-mode blower operation and stores diagnostic fault codes on its LED. When the board fails, the furnace may be completely dead, stuck on continuous fan, or unable to complete ignition despite good supporting components.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board (kit) |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition control, blower timing, diagnostics |
| Fits Model | RGS090SEAB0AAA |
| Fit | OEM direct replacement |
Compatibility
Designed for the RGS090SEAB0AAA furnace and used across many ICP-family gas furnaces marketed under Tempstar, Heil, Comfortmaker, and Arcoaire. Confirm the OEM number on your existing board, as ICP used several board revisions across production runs.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
- Access — Remove the blower/control-compartment service panel.
- Document — Photograph every wire and connector position on the old board before disconnecting anything.
- Remove — Unplug all connectors, release the mounting standoffs/screws, and lift the old board out.
- Install — Mount the new board, then reconnect each harness exactly as photographed, seating every connector fully.
- Test — Restore power, run a full heat cycle, and confirm ignition, flame proof, and proper blower timing with no fault-code flashes.
Signs You Need a Replacement
- Furnace is completely unresponsive with no LED activity on the board.
- Blower runs continuously or won't start despite a valid thermostat call.
- Visible burnt traces, scorched relays, or a cracked board.
- Erratic operation or fault codes that persist after replacing igniter, sensor, and switches.
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