After posting about no heat on passenger side and no reply I started looking at my blend valves with no progress and may have not placed them back in the correct position.
I can’t seem to find any post on how to calibrate or set the gear in the correct position.
After many hours I’ve come to the conclusion that my heater core is clogged due to incorrect anti freeze.
Is it true we can’t flush the Dodge Journey heater core?

 

I've heard plenty of people flushing the heater core. Where did you hear you could not?

 

have flushed them for this problem and got a slight improvement. put a cleaner in the system, run the engine for 15minutes, flush the system. isolate and backflush the heater core directly. be careful removing the heater core lines; old heater cores are fragile.