LOT E195 at Warsaw on Sep 11th 2014, anti ice problems

A LOT Polish Airlines Embraer ERJ-195, registration SP-LNC performing flight LO-379 from Warsaw (Poland) to Frankfurt/Main (Germany), stopped the climb out of Warsaw at FL200 due to problems with anti ice systems, requested to descend to 6000 feet and returned to Warsaw for a safe landing on runway 33 about 30 minutes after departure.

A passenger reported the captain announced some technical issues, the spoilers were deployed and the aircraft descended rapidly levelling off some time later followed by a normal landing, nothing abnormal could be seen upon disembarking the aircraft.