MDADDYRABBIT
Junior Member
I have had an issue with heater blowing cold air for the whole 14 months I have owned this 2016 Ram 2500 6.4. I can back flush the heater core and the heat will work for a few days. I drained the radiator, I put Prestone radiator flush and ran for a hour. Drained, flushed with fresh distilled water, Drained and flushed with distilled water a second time. I then back flushed the heater core. I then added antifreeze back and distilled water. Three to six days later cool air coming out. I looked online about changing heater core out and that is a $2500-4000 dollar repair. I am at wits end with this issue. Have any of you folks had any issues like this, if so what did you do?
