Originally Posted by jdokan
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