ICP Control Board for RHS240L0CA0AAAA — OEM Replacement Kit | Ships Today
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Overview
This genuine OEM control board kit (part 1183618) is the electronic brain of the ICP / Tempstar / Heil RHS240L0CA0AAAA heat pump. It sequences the compressor contactor, condenser fan, reversing valve, and defrost cycle, monitoring temperature and timing inputs to protect the system. When a control board fails, the unit may not respond to thermostat calls, get stuck in or skip defrost, short-cycle the compressor, or leave the outdoor fan running at the wrong time. Because the board governs anti-short-cycle and defrost protection, a faulty board can also lead to coil icing and reduced heat-pump efficiency. This kit ships as a complete board assembly ready to drop in.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Control board kit (defrost/sequencing) |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Fitment | OEM |
Compatibility
Designed for the ICP RHS240L0CA0AAAA heat pump and the RHS240 split-system family marketed under ICP, Tempstar, Heil, and Comfortmaker. Verify the board's connector layout and part number against your existing unit before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and confirm zero voltage with a multimeter.
- Access — Remove the condenser control-panel service cover to expose the board.
- Document — Photograph every connector, wire color, and terminal position before unplugging anything.
- Remove — Unplug the low- and line-voltage harnesses and unclip or unscrew the old board from its standoffs.
- Install — Seat the new board on the mounting standoffs and reconnect each harness exactly per your photo.
- Test — Restore power, run a heating and a cooling call, and verify proper sequencing, fan operation, and a normal defrost cycle.
Signs You Need a Replacement
- Unit does not respond to thermostat calls despite good 24V power.
- Heat pump is stuck in defrost or never defrosts, causing coil ice-up.
- Compressor short-cycles or the outdoor fan runs at the wrong times.
- Visible scorching, burnt traces, or failed relays on the existing 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