ICP Control Board for RHH090S0CA0AAAA — OEM 1183618 Replacement Kit | Ships Today
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Overview
This is the genuine OEM control board kit (part number 1183618) for the ICP / Heil / Tempstar RHH090S0CA0AAAA heat pump. The control board governs defrost timing, reversing valve switching, compressor sequencing, outdoor fan operation, and safety lockouts. A failed board can leave the unit unresponsive to the thermostat, unable to switch between heating and cooling, stuck in defrost, or short-cycling the compressor. Replacing it with a factory-matched board restores correct control logic and protects the compressor from harmful sequencing.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Control Board Kit |
| Brand | ICP / Heil / Tempstar |
| Fits Model | RHH090S0CA0AAAA |
| Application | Heat Pump |
| Fitment | OEM Direct Replacement |
Compatibility
Engineered as a direct-fit replacement for the ICP RHH090S0CA0AAAA heat pump and related Heil, Tempstar, and Comfortmaker units that originally shipped with control board 1183618. Verify your existing board part number before installation.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the board terminals.
- Access — Remove the control panel service cover to expose the board.
- Document — Photograph every wire and connector position before disconnecting anything.
- Remove — Unplug the harnesses, release the board standoffs/screws, and lift out the old board.
- Install — Seat the new 1183618 board and reconnect each harness exactly per your photos.
- Test — Restore power and confirm correct heating, cooling, defrost, and reversing-valve operation.
Signs You Need a Replacement
- Unit ignores thermostat heat or cool calls entirely
- System fails to switch between heating and cooling modes
- Stuck in or never enters defrost during cold weather
- Visible burnt traces, relay damage, or scorch marks on the board
Shipping & Returns
Ships same day on orders placed 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