ICP Control Board Kit for RHS240S0BA0AAAA 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 RHS240S0BA0AAAA heat pump. The control board is the brain of the outdoor unit — it manages the defrost cycle, monitors temperature sensors, sequences the compressor and condenser fan, and energizes the reversing valve to switch between heating and cooling. When this board fails, the unit may stop responding to the thermostat entirely, get stuck in defrost, short-cycle, or fail to switch modes. This kit ships complete and ready to drop in.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 (KIT CONTROL BOARD) |
| Type | Heat Pump Defrost / Sequencing Control Board |
| Brand | ICP (Tempstar / Heil) |
| Fits Model | RHS240S0BA0AAAA |
| Control Voltage | 24V |
| Fitment | OEM Direct Replacement |
Compatibility
Designed as a direct-fit replacement for the ICP Tempstar Heil RHS240S0BA0AAAA heat pump and closely related RHS240 series outdoor units that originally shipped with control board 1183618. Always 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 wire and connector position before disconnecting anything.
- Remove — Label and unplug each harness, release the standoff clips, and lift out the failed board.
- Install — Mount the new 1183618 board on the standoffs and reconnect each harness exactly per your photos.
- Test — Restore power, run a heating and a cooling call, and confirm proper defrost and reversing-valve operation.
Signs You Need a Replacement
- Unit unresponsive to thermostat calls despite power present
- Stuck in defrost or never defrosts (ice build-up)
- Will not switch between heating and cooling modes
- Visible 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