out_of_order
1. [ adjective ] not functioning properly
Synonyms: the_matter wrong amiss haywire awry
Examples:

"something is amiss" "has gone completely haywire" "the telephone is out of order" "what's the matter with your vacuum cleaner?" "something is wrong with the engine"

Related terms: malfunctioning
Similar spelling:   out_of_work
  out_of_reach
  out_of_print
  out_of_breath
  out_of_practice