ICP Defrost Control Board Kit for RHS183S0CA0AAAA — Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This OEM control board kit (1183618) is the defrost/sequencing brain of your ICP RHS183S0CA0AAAA heat pump. It monitors coil temperature and run time, manages the defrost cycle and reversing valve, and coordinates the compressor and outdoor fan. Supplied as a complete kit with mounting hardware and connectors, it replaces a board that has failed from power surges, corrosion, or burnt relays. A bad board typically shows up as a heat pump stuck in defrost, ice buildup on the outdoor coil, or an outdoor unit that won't run at all.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (Kit Control Board) |
| Type | Defrost Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Includes | PCB, mounting hardware, connectors |
| Function | Defrost timing, reversing valve, compressor/fan sequencing |
Compatibility
Direct OEM replacement kit for the ICP/Tempstar/Heil RHS183S0CA0AAAA heat pump and related RHS-series units using the same control board. Confirm your existing board part number against 1183618 before installing.
Installation Guide
- Safety First — Disconnect power and verify zero voltage with a multimeter; observe anti-static precautions when handling the board.
- Access — Remove the control-box service panel.
- Document — Photograph every connector and wire harness position before disconnecting.
- Remove — Unplug the harnesses, release the standoffs/screws, and lift out the old board.
- Install — Mount the new board on the standoffs and reconnect each harness per your photo.
- Test — Restore power, run a heating and cooling call, and verify a normal defrost cycle.
Signs You Need a Replacement
- Heat pump stuck in defrost or never defrosts (ice on outdoor coil)
- Outdoor unit won't run in heating or cooling
- Visible burnt traces, scorched relays, or corrosion on the board
- Erratic compressor or reversing valve operation
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