Tosot
Short Cycling / Improper Control or Sizing
Unit frequently turns on and off (short cycling)
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Possible Causes
Oversized Tosot unit for room size, Thermistor located in direct airflow, Dirty filters causing rapid temperature swings, Faulty room temperature sensor
How to Fix / Troubleshooting
Safety first: Turn off power before moving sensors.
- Check sensor placement: Ensure the room temperature sensor is not directly in the cold air stream. Reposition slightly if possible.
- Clean filters and coils: Restore proper airflow to reduce rapid temperature changes at the sensor.
- Verify setpoint and mode: Avoid setting extreme temperatures that cause rapid cycling.
- If problem persists: A technician may need to relocate the sensor or confirm correct unit sizing.
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Repair Difficulty
Easy
2/5
Required Part
Indoor Room Temperature Sensor
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