ICP Control Board Kit for RHS150H0CB0AAAA — OEM Defrost Control | Ships Today
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Overview
This OEM control board kit (OEM 1183618) is the electronic brain of the ICP/Heil/Tempstar RHS150H0CB0AAAA heat pump. It manages defrost timing, reversing valve operation, fan and compressor sequencing, and safety interlocks across the 24V control circuit. The kit ships with the mounting hardware and connectors needed for a clean replacement. When the board fails you may see no defrost cycle, a unit that ices over in heating mode, erratic mode changes, or a complete no-start condition. Swapping in a new OEM board restores correct sequencing and protects the compressor from short-cycling and frost damage.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1183618 |
| Type | Control Board Kit (Defrost / Sequencing) |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Control Voltage | 24 VAC |
| Includes | Board + Mounting Kit |
| Application | Heat Pump Defrost & Sequencing |
Compatibility
Built for the ICP / Heil / Tempstar RHS150H0CB0AAAA heat pump and equivalent RHS150-series units that use this board kit. Confirm the OEM part number on your existing board before ordering, as defrost boards vary by platform.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service panel to reach the control box.
- Document — Photograph every harness connection and the defrost timing jumper position before unplugging.
- Remove — Unplug the harnesses, release the board standoffs/screws, and lift out the old board.
- Install — Mount the new board, set the defrost timing jumper to match the original, and reconnect each harness per your photo.
- Test — Restore power, run a heating cycle, and verify defrost initiates and terminates correctly.
Signs You Need a Replacement
- Outdoor coil freezes over with no defrost cycle
- No response on a call for heat or cool
- Erratic switching between modes or short-cycling
- Visible burn marks, swollen relays, or scorched traces 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