What Sensor Check Means
The Profi controllers accept an optional product sensor that measures temperature at any point inside the cabinet rather than in the airflow. Sensor check is the setting that puts that probe under supervision: with it on, the electronics monitor the sensor and signal an alarm if it fails.
Common Causes of Sensor Check
- A product sensor fitted but left unmonitored
- A probe lead damaged where it passes through the cabinet
- A sensor that has failed and is now being reported by the check function
🔧 One Safe Check You Can Try
If a product sensor is fitted, make sure sensor check is switched on — an unmonitored probe that has failed simply reports nothing, and a cabinet trusted on a dead probe is worse than one with no probe at all. The standard display can be switched between the product sensor, the ordinary sensor, both, and the date and time.
⚠ Why You Shouldn't Go Further Than That
- Product sensors are fitted where the temperature actually matters, so a failed one removes exactly the measurement the operation was relying on.
- Liebherr routes the probe through the compressor compartment and asks that the opening is sealed, which makes retrofitting or replacing one a job with a specific method rather than a cable-pushing exercise.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.