A:Answer Hi Zach - Thanks for reaching out to us regarding your air conditioner. We are sorry to hear of the mildew smell and can certainly understand your concern. A properly working unit by itself does not usually produce any form of odor. Smells generally come from a dirty unit or is something that is recycled from the room itself. The constant warming and cooling on these machines can build up moisture quickly. If it doesn't evaporate or drain properly, the stagnant water can lead to fungi, molds, and mildews and cause a musty odor. Make sure the rear grille is not restricted since the unit must have proper air flow. It is very important not to have anything blocking the grille on the room air conditioner, like furniture, drapes, plants, etc. A dirty air filter will restrict air flow. Make sure the air filter has been cleaned in the last 30 days. See CLEANING A ROOM AIR CONDITIONER: https://products.geappliances.com/appliance/gea-support-search-content?contentId=16737 - You can also view the Owner's Manual here: https://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=49-5000462.pdf - See page 14 regarding removing the subbase water plug if it needs to be drained. If you have any additional questions, don’t hesitate to ask. We are also happy to help at GEAppliances.com! Sue
