Heater Blowing warm not Hot

[Taran Tavares]

Hello,

I have a 2015 2500 6.4L. Lately my heater has been blowing warm, but not what it used to be. A couple weeks ago I had to replace thermostat, water pump, radiator. I haven't had a chance to look at the heater core. The coolant gets around 215 degrees, and the system should be burped by now. Any thoughts?

 

[HDGoose]

Check the flow through the heater core. My 2013 was clogged because it simply is a bad design. Heater cores should be flushed every year or two to help prevent blockages.

Perhaps tryin to reverse flow your core will help flush it.

But for only $52k I fixed that issue with my 2013 2500 with a 2020 RAM 3500.

 

[Taran Tavares]

Okay I'll have to give that a try thanks! if only I could afford the new one I they look good!

 

[NJMOPAR]

Could be a bad t-stat, or the weep hole is down instead of up.

 

[three D]

I flushed the heater core about 20 times about a 2 gallons each time into a bucket and flakes of junk every time. my heater is working better still a not that warm on the drivers side. 2014 2500 6.4 105000 miles

 

[Taran Tavares]

Yes I'm going to try flushing the core when temps get above freezing. The thermostat, radiator, and water pump have all already been replaced.