A warning to some Costco customers: The company has recalled nearly a dozen items in recent months. It’s urging shoppers who have bought the products to stop using them immediately. They include the Danby 8K U-shaped window air conditioner. The product may have been sold under other names such as Comfort Aire or Keystone.

Costco accepts most returns without time limits, though there are some exceptions. Electronics have a 90-day return window. Cigarettes and alcohol may not be returned where it’s against the law. Airline and live performance event items, ticket items, precious metals, Shop Cards and gift cards are not returnable.

Costco is famous for its return policy. It lets members give back most things if they're not happy, but some clear limits are set to keep it easy to manage. Shoppers can take back daily items with no big trouble, but for electronics, there's a set 90-day return time.