ICP Control Board Kit for RHS243H0FA0AAAA — OEM 1183618 | Ships Today
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Overview
This is the genuine OEM control board kit (Part Number 1183618) for the ICP / Tempstar / Heil RHS243H0FA0AAAA heat pump. The control board is the brain of the outdoor unit — it interprets thermostat calls, sequences the compressor and condenser fan, manages the reversing valve for heat/cool changeover, and runs the timed and demand defrost cycle in heat-pump mode. When the board fails, the unit may not respond to a thermostat call, get stuck in defrost or never defrost, fail to switch between heating and cooling, or show no output to the contactor and fan at all. Because it ships as a complete kit, this part includes the board and the mounting hardware needed for a clean factory-spec replacement, restoring correct sequencing and full defrost protection.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Description | Kit, Control Board |
| Type | Heat Pump Defrost / Sequencing Board |
| Brand | ICP / Tempstar / Heil |
| Fits Model | RHS243H0FA0AAAA |
| Fitment | OEM Direct Replacement Kit |
Compatibility
Engineered as a direct-fit replacement for the ICP RHS243H0FA0AAAA heat pump and the RHS243 family sold under the ICP, Tempstar, Heil, and Comfortmaker labels. Verify the printed board number against your original before installing.
Installation Guide
- Safety First — Disconnect the breaker and outdoor disconnect. Verify zero voltage with a multimeter before touching the board.
- Access — Remove the control/service panel to expose the board.
- Document — Photograph every harness plug, sensor lead, and terminal position before disconnecting.
- Remove — Unplug each connector, release the board standoffs or mounting screws, and lift the old board out.
- Install — Mount the new board with the included hardware and reconnect every plug per your photo.
- Test — Restore power, call for heating and cooling, and confirm correct sequencing, changeover, and a normal defrost cycle.
Signs You Need a Replacement
- Unit does not respond to any thermostat call
- Heat pump stuck in or never entering defrost
- No output to the contactor, fan, or reversing valve
- Visible burn marks, corrosion, 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