Unit cycles on and off very frequently (short cycling), with small temperature changes.

How to Fix / Troubleshooting

Safety: Unplug the unit before moving sensors or accessing the control board.

Steps:

Improve ventilation: Ensure adequate clearance around the cooler and avoid enclosing it tightly in cabinetry without proper airflow.
Check sensor placement: Verify the cabinet thermistor is located where the manufacturer intended and not directly on the evaporator or in a dead-air corner.
Stabilize environment: Avoid placing the cooler near heat sources or in areas with large ambient temperature swings.

If short cycling persists and affects temperature stability, the control board may need reprogramming or replacement by a service professional.