Storage conditions, damage and the correct installation arrangement matter after a period of non-use. A clean-looking drum alone does not establish readiness.
Understanding this situation
Check the manufacturer's return-to-use guidance and safely accessible signs of damage. Damp storage, pests, an altered vent or a missing filter can change the situation even when the appliance worked previously.
A useful next step
Restore only documented owner-maintenance items and obtain appropriate help for installation or internal concerns. Do not run an empty hot cycle as a safety inspection. Report the storage history and any unusual sound, smell or warning.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.