ICP Control Board Kit for RHH036L0XA0AAAA — OEM 1183618 Heat Pump Board | Ships Today
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Overview
This is the genuine OEM control board kit (part number 1183618) for the ICP / Tempstar / Heil RHH036L0XA0AAAA heat pump. The control board is the brain of the outdoor unit — it manages the defrost cycle, sequences the compressor and reversing valve, monitors high- and low-pressure safety switches, and coordinates the 24V signals between the thermostat, contactor, and condenser fan. When this board fails, the unit may lose heating or cooling entirely, get stuck in defrost, or fail to respond to thermostat calls. Replacing it with a factory-matched board restores correct timing and protects the rest of your equipment.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Description | Kit, Control Board |
| Type | Heat Pump Defrost / Sequencing Board |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Fits Model | RHH036L0XA0AAAA |
| Fit | OEM |
Compatibility
Engineered as a direct OEM fit for the ICP/Tempstar/Heil RHH036L0XA0AAAA heat pump and related models in the same family that originally shipped with control board 1183618. Always confirm your unit's part number against the existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the control panel service cover from the outdoor unit.
- Document — Photograph every wire and terminal connection on the old board before disconnecting anything.
- Remove — Label and disconnect all low- and line-voltage leads, then unscrew the failed board from its standoffs.
- Install — Mount the new 1183618 board, reconnect each wire exactly per your photo, and verify the defrost timing jumper matches the original.
- Test — Restore power, run a thermostat call for heat and cool, and confirm the compressor, fan, and reversing valve cycle correctly.
Signs You Need a Replacement
- Unit does not respond to thermostat calls for heat or cool
- Heat pump stuck in continuous defrost or never defrosts
- Compressor or fan fails to energize despite a good contactor
- Visible scorching, burnt relays, or corrosion 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