Heater Will not get HOT on 2001 Dodge Ram 2500

The engine is running about 190' but the heater will not get hot; only warm.

Asked by for the 2001 Dodge Ram 2500
flush heater core take hose off engine get a colpin to put on water hose flush one hose at a time till water runs clean
1 more answer
check your coolant level in your radiator, they run on the same system.