ICP Control Board Kit for RHS183H0CA0AAAA — OEM Defrost Board | Ships Today
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Overview
This OEM control board kit (part 1183618) is the electronic brain of your ICP RHS183H0CA0AAAA heat pump. It manages the defrost cycle, energizes the reversing valve to switch between heating and cooling, sequences the compressor contactor, and times the condenser fan. The kit ships with the mounting hardware and connectors needed for a clean replacement. Control boards fail from power surges, lightning, moisture intrusion, and simple age — burned relay traces and cracked solder joints are common. When the board goes, symptoms range from a heat pump stuck in defrost, to ice buildup on the outdoor coil, to no heating or cooling at all despite a good thermostat signal. A scorched spot or blown relay visible on the board confirms it.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1183618 |
| Type | Defrost / Heat Pump Control Board Kit |
| Brand | ICP / Heil / Tempstar / Comfortmaker |
| Control Voltage | 24V |
| Functions | Defrost, reversing valve, compressor, fan timing |
| Includes | Board, connectors, mounting hardware |
| Fit | Direct OEM Replacement |
Compatibility
Direct-fit replacement kit for the ICP RHS183H0CA0AAAA heat pump and the ICP-built Heil, Tempstar, and Comfortmaker units that share this control board. Verify the original board part number before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the board terminals with a multimeter.
- Access — Remove the control-panel service cover on the outdoor unit.
- Document — Photograph every harness and plug position on the board before disconnecting.
- Remove — Unplug each connector, release the board standoffs or screws, and lift the old board out.
- Install — Mount the new board on the supplied standoffs and reconnect each harness exactly per your photo and the wiring diagram.
- Test — Restore power, confirm a normal startup, and verify the unit heats, cools, and exits defrost correctly.
Signs You Need a Replacement
- Outdoor coil ices over and the unit never defrosts
- Heat pump stuck running in defrost mode
- No heating or cooling despite a valid thermostat call
- Visible scorch marks or a blown relay 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