I have a 2002 Dodge Ram. I just need a little help with a Heat problem. Not sure when this started. I live in MN, when my truck is all warmed up and I am driving the Heat works just fine. the problem is with i am slowing down stopped or just idling the Heat stops working and turns to cold air??? DO you think i have a bad thermostat or am I low on anti freeze? The truck does not over heat and runs fine other wise. I do not have any fluid in my overflow reservoir. Just wondering where I should start? Any thought and or ideas would be great. Also if you think i am low on anti freeze, do you think i should drain the hole thing and start fresh?
Thanks in advance

 

Had the same problem. I added coolant and it went away. Now I have big problems. No heat. Had to replace my leaking heater core, put in a new thermostat, checeked for air. Sill no heat and my engine is over heating. Still working on it.

 

you are 100 % def low on coolant

 

just add some 50/50 and you should be fine....depending on how low you are

 

Moving to the 3rd Gen Ram section where it should be for optimum visibility...