ICP Furnace Control Board for RGS300HDFA0AAAA — OEM Kit 1183618 | Ships Today
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Overview
The OEM Control Board Kit (part #1183618) is the integrated furnace control (IFC) that manages the complete heating sequence for your ICP Tempstar Heil RGS300HDFA0AAAA gas furnace. This board orchestrates ignition timing, gas valve operation, blower control, and flame sensing, while running continuous self-diagnostics and flashing fault codes through its onboard LED. When the control board fails, the furnace loses its 'brain' — even when every other component is healthy. Common failure symptoms include no response from the thermostat, the furnace failing to ignite, the inducer or blower running continuously, intermittent lockouts, or burned/corroded relay contacts on the board itself. Power surges, overheating, moisture intrusion, and aged relays are the usual culprits. This is a factory OEM kit, so it ships with the correct firmware and connector layout for a true plug-and-play replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Fitment | OEM Direct Replacement |
| Diagnostics | LED fault-code indicator |
Compatibility
Engineered as a direct-fit replacement for the ICP Tempstar Heil RGS300HDFA0AAAA gas furnace. ICP-built equipment is sold under multiple brands — Comfortmaker, Arcoaire, KeepRite, and Day & Night — so this board fits many cross-branded units sharing the same chassis. Always verify the printed part number on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the service switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control-compartment service panel.
- Document — Photograph every wire harness and connector position before disconnecting.
- Remove — Unplug all low- and line-voltage connectors, release the mounting screws/standoffs, and lift out the old board.
- Install — Mount the new board, then reconnect each harness exactly per your photos.
- Test — Restore power, call for heat, and confirm a full ignition cycle with no fault codes.
Signs You Need a Replacement
- Furnace is completely unresponsive to thermostat calls
- Blower or inducer motor runs nonstop or won't start
- Repeated ignition lockouts or erratic LED fault codes
- Visible burn marks, corrosion, or swollen 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