ICP Control Board Kit for RHS240S0AA0AAAA Heat Pump — OEM 1183618 | Ships Today
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Overview
This is the genuine OEM control board kit (part #1183618) for the ICP / Tempstar / Heil RHS240S0AA0AAAA heat pump. The board manages the defrost cycle, reads the outdoor temperature and coil sensors, sequences the compressor and condenser fan, and drives the reversing valve to switch between heating and cooling. A failed board commonly shows up as a unit that ignores the thermostat, gets stuck in or never enters defrost, short-cycles, or refuses to change modes. The kit arrives complete and ready to install.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (KIT CONTROL BOARD) |
| Type | Heat Pump Defrost / Sequencing Control Board |
| Brand | ICP (Tempstar / Heil) |
| Fits Model | RHS240S0AA0AAAA |
| Control Voltage | 24V |
| Fitment | OEM Direct Replacement |
Compatibility
Direct-fit replacement for the ICP Tempstar Heil RHS240S0AA0AAAA heat pump and related RHS240 series outdoor units originally equipped with control board 1183618. Confirm the printed part number on your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
- Access — Remove the outdoor unit control box / service panel.
- Document — Photograph every harness and connector position before disconnecting.
- Remove — Label and unplug each connector, release the board standoffs, and lift out the failed board.
- Install — Snap the new 1183618 board onto the standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, run heating and cooling calls, and verify correct defrost and reversing-valve operation.
Signs You Need a Replacement
- Unit unresponsive to thermostat calls with power present
- Stuck in defrost or never defrosts (ice build-up)
- Won't switch between heating and cooling
- Burn marks, swollen relays, or a burnt smell 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