Horrible smell after turning A/C off

Bking

The thing is I don't smell it when the A/C is off (fresh air mode), doesn't matter if it's raining or sunny. But as soon as I turn it off after using the A/C, I smell dirty moldy towels blasting in my face.

SouthArk370Z

It's pretty much impossible to prevent mold/mildew around the evaporator. It stays wet/damp a lot and you're always bringing in outside air that contains spores. Even if you get rid of it, it will just come back.

Same thing happens with home A/Cs but they are designed to run the fan for a while after the compressor shuts off which helps drying and limits growth to acceptable levels.

As others have mentioned, running with the compressor off as much as possible will help keep things drier and reduce (not eliminate) the problem. Turning it off a block before you park will not help all that much as it takes a while for the evaporator to warm up and things to dry out; but it's better than nothing.

If the smell is really bad you may have a very large accumulation or a very smelly variety. I'm not sure what to do in that case - call a pro.

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