SMEG
Control or Sizing Issue / Thermostat Cycling
Unit short cycles: frequently turns on and off within a few minutes
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Oversized SMEG unit for room size, Temperature sensor located in direct airflow, Dirty filters causing uneven temperature sensing, Faulty indoor PCB or sensor
How to Fix / Troubleshooting
Safety first: Use caution when accessing sensors and PCB; disconnect power first.
- Check sensor placement: Ensure the room sensor is not directly in the cold air stream; reposition if possible according to SMEG guidelines.
- Clean filters and coil: Restore proper airflow to reduce rapid temperature swings.
- Avoid extreme setpoints: Set temperature to a moderate level (e.g., 23–25°C) to reduce aggressive cycling.
- Evaluate capacity: If the unit is significantly oversized, consider using lower fan speeds or consulting an installer about zoning or resizing.
If short cycling persists and comfort is poor, a technician should check sensor calibration and PCB operation.
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Repair Difficulty
Medium
3/5
Required Part
Indoor Ambient Temperature Sensor (NTC)
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