Check the alarm instrument's own battery, sensor and operating instructions. A malfunctioning monitor can give unreliable information, but it should not be used to dismiss a possible freezer problem.
What the observation tells you
A low battery, disconnected probe or wrong alarm threshold can affect the report. The probe must also be suitable for frozen conditions and positioned as intended. Repeatedly opening the cabinet to inspect it can disturb the measurement.
A useful next step
Confirm with dependable temperature information and preserve any actual thawing evidence. Repair or replace the monitor as needed, and assess the appliance independently if its storage condition remains doubtful.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.