doğru dürüst çalışmayan

listen to the pronunciation of doğru dürüst çalışmayan
Турецкий язык - Английский Язык
on the blink
functioning erratically, malfunctioning; not working or not working well. Usually refers to a mechanical or electrical device

My toaster is on the blink, making either charcoal or cold bread.

not working properly, out of order