ICP Furnace Control Board Kit for RGS090STCA0AAA – OEM 1183618 | Ships Today
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Overview
The ICP Control Board Kit (OEM part 1183618) is the integrated furnace control (IFC) brain of your ICP / Tempstar / Heil RGS090STCA0AAA gas furnace. It manages the complete ignition and operating sequence — sequencing the inducer motor, hot surface igniter, gas valve, and blower motor while continuously monitoring safety inputs such as the pressure switch, limit switch, and flame sensor. When this board fails, the furnace typically loses ignition entirely, throws repeated fault flash codes, short-cycles, or runs the blower continuously. Common failure causes include power surges, cracked solder joints from thermal cycling, blown onboard fuses, and corroded relays. This is a complete OEM kit, so it ships with the correct firmware and configuration for the RGS090 platform.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP (Tempstar / Heil) |
| Control Voltage | 24V |
| Line Voltage | 120V |
| Fit | OEM Direct Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil RGS090STCA0AAA gas furnace and matching RGS090 platform variants. Always confirm 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 furnace blower compartment service panel.
- Document – Photograph every wire and connector position on the existing board before disconnecting anything.
- Remove – Unplug each harness, release the mounting standoffs or screws, and lift out the failed board.
- Install – Mount the new board on the standoffs and reconnect every harness exactly per your photos.
- Test – Restore power, initiate a heat call, and confirm the full ignition sequence and blower operation; check the diagnostic LED for normal status.
Signs You Need a Replacement
- Furnace will not ignite and the diagnostic LED shows a hard-lockout or board fault code.
- Blower or inducer runs constantly or fails to start.
- Furnace short-cycles or behaves erratically with no thermostat change.
- Visible burn marks, corroded relays, or a blown fuse on the existing 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