What the symptom can mean
An airing selection and a heating failure can both leave a cool load. The accepted programme and completion state help distinguish expectation from a changed function.
Keep the setting visible
Record the programme name and any temperature or low-heat option. Say whether it ran to end, stopped early or was cancelled. Include the approximate time and whether the drum was moving.
Explain what changed
If a familiar setting previously gave a different result, compare the same fabric type and load. Cool laundry at the end alone does not identify a heater, sensor or other component.