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Heating & Cooling 4th Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #11  
Old 12-04-2018, 10:51 PM
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SawdustJ SawdustJ is offline
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You can try to flush the heater core while leaving the truck intact except for removing the heater lines from the core right at the firewall. It's really not that hard to do, just a bit of fussing. The AC lines will not need to be touched.

If you've tried this and it doesn't solve the problem, or you've otherwise determined the heater core needs to be removed, then the AC will need to be evacuated and the lines disconnected at the firewall right beside the heater core connections.
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  #12  
Old 01-15-2019, 11:17 AM
jdokan jdokan is offline
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Default No Heat Drivers side

I suspect the flushing as a fix for me as my 2014 has very hot hoses both in and out....So I think the core is getting heat.... This is really strange situation...I would think if the issue is a door not opening then I would get restricted air flow...flow is there just not hot...???
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Old 01-15-2019, 03:09 PM
ajpillz ajpillz is offline
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Quote:
Originally Posted by jdokan View Post
I suspect the flushing as a fix for me as my 2014 has very hot hoses both in and out....So I think the core is getting heat.... This is really strange situation...I would think if the issue is a door not opening then I would get restricted air flow...flow is there just not hot...???
So I switched out the Heater Core in mine about a month ago and the core was defiantly plugged. My inlet and outlet hoses were hot as well and the flush didn't did nothing to unplug mine. Based on the heater core design the it could be 90% plugged and both inlet and outlet lines could be hot. The Core is like a tank that fills up vs a routed line that goes back and forth like a snake and eventually exits. Idk if I am explaining that very well but the coolant doesn't go through a directional path, it just pressurizes the core and the coolant circulates in and out at random. Hints why we are all having this problem. Its a bad design. However a positive to that is we don't get varying heat went the T stat opens and closes. shrug.

Here is a picture of mine cut open. kind hard to see but it almost looks like an epoxy resin that is clogging the ports.

I ended up flushing the system with cleaner several times, replaced the Heater Core, Radiator, Radiator Hoses, and the water pump (mine was fine just added insurance due to miles).

Blows heat so hot it will burn your hands if you leave them there to long
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Last edited by ajpillz; 01-15-2019 at 03:12 PM.
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