After noticing no hot air on the passenger side today I did the heater core flush and it was successful. Recommend flushing in both directions and alternating back and forth and also use some compressed air in both directions. Kept getting small flakes then finally none. Also use hot water then cold water. Final purge was compressed air then topped off with the correct Mopar antifreeze. Previous unmarried owner was near Daytona Florida so may not have used the heat much and it was hot on the driver side. 2012 3.6 with 58000 miles. Hopefully this will last for a while.