First of all, check the food inside. Is it being cooked properly? If so, your air fryer is probably fine. Check on what material your air fryer basket is made from and note that some materials may not be fit for direct contact with water or dishwasher. In this case, clean baskets by hand after use and wipe them dry before putting them back into the appliance. Never use soap while cleaning the basket as it can damage the non-stick surface of the basket’s coating or cause a breakdown in its non-stick properties. Wipe off any spills or excess fat with a paper towel to avoid a build-up that will eventually drip down onto heating elements below resulting in smoke which can also lead to an overheated appliance.
If your fryer is still steaming, unplug it and contact the service center.
Air fryers by design will emit some steam when cooking and this should not cause any concern. If, however, you see a lot of steam coming from your appliance regardless of what’s being cooked inside or during shutoff period (30 minutes after cooking is finished) this may indicate that there is too much moisture in the appliance which could lead to damage over time. Try to get rid of excess water: leave door open for half an hour if the air fryer is still warm; leave trays out to let water evaporate; wipe down with a clean towel or paper towels; dry thoroughly before putting them back into the appliance; every time you open the door to release steam, a lot of moisture is pushed out so opening the door more often will help.