Air conditioner ?

Question:my air conditioner has a sour smell anyone know how to fix it or why it happened?

Answers:
When an air conditioner runs it collects moisture out of the air. This is called condensation. You can see this if you have a ice cold drink sitting on the table and it forms water on the outside of the glass.

This condensate will sit in your unit over the season and when you start it up again the following summer it will sometimes have an odor.

There are two solutions. One is to get scented air filters for your AC Unit and the other is to put an air fresher by the return air grill.

This smell will not last. As the unit runs it will produce more condensate and "wash" the smell away.