Definition: Repeated temperature fluctuations above and below the target temperature range. Can be caused by poor equipment control, door openings, or system cycling.
Why It Matters:
- Accelerates product degradation
- Causes ice crystal growth in frozen products (texture damage)
- Increases freezer burn risk
- May indicate equipment malfunction or improper sizing
Acceptable vs. Problematic:
- **Acceptable**: ±2°C cycling around setpoint due to normal system operation
- **Problematic**: ±5°C+ swings, frequent temperature excursions, or crossing critical thresholds
Related Terms: Temperature Stability, Temperature Excursion, Thermostat Dead Band