heater not working on 2002 Dodge Ram 1500

heat work when first turned on then blows cold air

3 answers
We recently had this problem on a 2003. My trusty service guys found a hole in the radiator. Problem solved with new radiator and coolant.
check for low coolant level change coolant or thermostat or both, if fluid on floor mat front d and p or even just one side- insi
de heating core is likely gone
the heater in my truck dose the same thing, called dodge a year ago they told me that there is recall on my truck for the heat blower.