Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
ATC Issue All Types; Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Issued New Clearance; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification
Aircraft; Procedure; Weather
On descent into ZZZ at approximately 21;000 while in moderate icing conditions (wing and cowls on); we received a Wing Anti-Ice Duct warning message. We ran the QRH which instructs to leave icing conditions. We contacted [ATC] and said we need a lower altitude to leave icing conditions. [After coordinating with ATC; we] received a descent to 11;000. At approximately 17;000; icing conditions were cleared. We elected to divert due to ZZZ1 entering indefinite holds. We landed without further incident.
CRJ-900 Captain reported receiving a Wing Anti-Ice Duct warning before descending out of icing conditions.