Cleaning can reveal an existing problem or change how a removable part is seated. The sequence is useful evidence without implying that the owner necessarily caused the fault.
Understanding this situation
Note which permitted components were removed, whether they refitted normally and when the new warning appeared. Avoid repeated dismantling to undo an uncertain step.
A useful next step
Keep the machine unused if parts will not fit or a safety symptom remains. Provide the full model and describe the actual maintenance. This is more helpful than omitting it because filter care seemed too routine to mention.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.