After a month the bottom basket measured about 50 degrees cooler than the top; the warranty replacement housing had the same problem.
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Most owners hit problems, mainly faulty displays that stopped working.
What owners love, and what they don’tWhat owners noticed
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Owner reviews (5)
Showing 2 reviews mentioning uneven cooking Show all
Likes it overall but fries take 30 minutes or more instead of 20 and come out unevenly cooked despite shaking.
Common questions about Ninja Double Stack XL SL400
What do owners say about Ninja Double Stack XL SL400?
Most owners hit problems, mainly faulty displays that stopped working. Some also found uneven cooking, with the bottom basket running cooler or fries cooking unevenly.
Is Ninja Double Stack XL SL400 worth it?
Of the 5 reviews with a clear verdict, 0% are positive, 40% mixed and 60% negative. The most common complaint is broke down.
What are the most common complaints about Ninja Double Stack XL SL400?
The complaints reviewers mention most: broke down (4 reviews) and uneven cooking (2 reviews). For example: The display shows a faint 8 and 2 when switched off; Ninja replaced the air fryer under warranty with a new one.
What does the signal score of 23 mean?
It's how well reviewed Ninja Double Stack XL SL400 is, out of 100, next to the other air fryers here. Two things go in: how its reviews compare with the best-reviewed appliance (positive reviews, mixed counting half, and how many reviews there are), and its own negative and mixed reviews, which take points off, so only a appliance few people are unhappy with scores in the high 90s. It's worked out from reviews only, needs at least 5 of them, and updates as new ones come in.
What are the specs of Ninja Double Stack XL SL400?
Category: Air fryer. Type: Dual-basket air fryer. Capacity: 9.5 L. Model number: SL400UK. Power: 2470 W.
Where do these Ninja Double Stack XL SL400 reviews come from?
5 are quotes from Reddit, each linked to the original. Owner reviews are checked for spam before they appear. Every review, written here or quoted, is read as positive, mixed or negative.



