ICP Control Board Kit for RHS181L0CA0AAAA — Heat Pump Defrost Control | Ships Today
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Overview
This OEM control board kit (ICP part 1183618) is the electronic brain of your ICP RHS181L0CA0AAAA heat pump. It manages the defrost cycle, reversing-valve sequencing, compressor timing, and the 24V control logic that ties the outdoor unit to the indoor air handler and thermostat. When this board fails, the system may stop heating or cooling, get stuck in or skip defrost, ice over the outdoor coil, or behave erratically. The kit ships with the replacement board and the mounting hardware needed for a clean swap.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Control Board Kit (Defrost / Sequencing) |
| Brand | ICP / Heil / Tempstar |
| Control Voltage | 24V |
| Application | Heat Pump Outdoor Unit |
| Fit | OEM Replacement Kit |
Compatibility
Designed for the ICP / Tempstar / Heil / Comfortmaker RHS181L0CA0AAAA heat pump and compatible RHS181 series units calling for control board kit 1183618. Confirm the part number printed on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the outdoor unit's electrical control panel cover.
- Document — Photograph every wire and connector on the board before removing anything.
- Remove — Label and unplug the low- and line-voltage harnesses, then unscrew the board from its standoffs.
- Install — Mount the new board on the standoffs and reconnect each harness exactly per your photo.
- Test — Restore power, run a heating and cooling call, and verify a normal defrost cycle.
Signs You Need a Replacement
- No heating or cooling despite a good thermostat call
- Outdoor coil icing because defrost never initiates
- Unit stuck in defrost or short-cycling the compressor
- Visible burn marks, corrosion, or cracked solder 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