Warm air from vents often points to low refrigerant, dirty coils, or a compressor issue

https://winterhavenhvactroubleshooting335.novacrestiq.com/posts/how-same-day-ac-repair-restores-cool-comfort-fast

Warm air from vents often points to low refrigerant, dirty coils, or a compressor issue. Turn the system off and call a licensed HVAC technician for inspection.