Pick the issue you're seeing for a ranked list of likely causes and what to try first.
Or pick a common issue
Dirty or clogged air filter restricting airflow. Check your filter — if it's grey/caked with dust, replace it. This is the single most common cause.
Dirty filter reducing overall airflow. Replace the filter — reduced airflow disproportionately affects rooms farthest from the unit.
Condenser coils covered in dust (usually behind/underneath the fridge). Unplug the fridge and vacuum the coils.
Water filter is clogged or past its replacement interval. This is the most common cause — replace the water filter.
Lint trap not cleaned before this load. Clean the lint trap before every load — this alone fixes most cases.
Vent blockage causing heat buildup. Stop using the dryer and have the vent inspected and cleaned before running it again.
Debris filter clogged with lint, hair, and residue. Clean the drain/debris filter — most front-loaders have an access panel near the bottom.
Drain/debris filter clogged. This is the most common cause — clean the filter (check coins, buttons, and lint).