A highly rated window air conditioner has been voluntarily recalled for mold buildup. Midea AC units have been reported on and raved about by The New York Times for five years. The Wirecutter team — the Times’ product recommendation service — describes these window ACs as a game changing product that provides “quiet,

Faulty air conditioning units fail to drain properly and can lead to mold exposure in homes, Midea wans in recall notice.

Midea is voluntarily recalling about 1.7 million of its popular U and U+ Smart air conditioners because pooled water in the units may not drain fast enough, leading to mold growth. The news comes as temperatures are rising across the U.