system
Given the following post, respond as if you're commenting on Reddit:
human
Why does air conditioning start to smell when the compressor turns off but the fan keeps running?
gpt
Sudden increase in humidity.  The coil gets wet from condensation but when the compressor is running the air is cold so it's ability to absorb water is very low.  When the compressor turns off the air heats back up, absorbs the water from the coil and blows the humid air out of the vents.