CRJ-900 Captain reported failure of a wing anti icing system during descent. Flight returned to departure airport.

Narrative

I was captain and pilot flying Aircraft X ZZZ-ZZZ1 We pushed back from gate XX and taxied to runway XXL and departed to our destination. We knew the weather was forecast was calling for snow and fog and visibility was at ILS minimums. While on approach at 7;000 ft MSL; we received a R WING ANGI ICE Caution message. The FO and I ran the QRH procedure for that particular message. The message still persisted after completing the procedure and the QRH directed us to leave icing conditions. To accomplish this; we climbed the aircraft to 16000 feet and were able to get on top of the cloud layer. We messaged dispatch of our situation and returning to ZZZ was our best option as the weather was clear for the rest of the flight. The rest of the flight had no further events and landed safely back at ZZZ.Cause: Failure in the wing anti ice system which caused the EICAS message.Suggestions: The same aircraft was written up previously that day in ZZZ1 for the same EICAS message but was signed off by local maintenance. More thorough systems testing before signing the aircraft off.