An unreliable measuring device can confuse the investigation. Check its battery, operating range and instructions before treating an implausible reading as a confirmed appliance failure.
What the observation tells you
A fading screen, intermittent reset or a sensor intended only for room temperatures may not provide trustworthy evidence. That does not mean every unwelcome result is the instrument's fault. Food still needs suitable storage while the measurement is clarified.
A useful next step
Use a dependable fridge thermometer and compare readings under consistent conditions. Record any instrument change in the temperature log. Do not repeatedly adjust the appliance to chase readings from a device that is malfunctioning.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.