human
How do I know when to replace my air conditioner filter?
assistant
You can usually tell when it's time to replace your air conditioner filter by the smell of the air coming from your unit. If you notice a strong or musty odor, this could be an indication that your filter needs to be changed. Additionally, if your air conditioner starts making strange noises or not cooling properly, this could also be a sign that the filter is no longer effective and should be replaced.