Comparable readings help show whether the original symptom changed. A different instrument position or loading condition can make an improvement or deterioration appear larger than it is.
What the observation tells you
The two compartments still need appropriately ranged instruments and separate labels. Follow the repairer's recovery guidance rather than checking continuously with the doors open. Do not delay food protection to complete a comparison if conditions remain unsuitable.
A useful next step
Record the settings, timing and method used before and after work. Contact the repairer with a concise factual comparison if the expected result is not achieved.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.