2011 ram 5.7 190k on it i am getting more heat out pass side them i am driver side. Now i have owned many dodges so i went and flushed heater core got all air out ect pass side heat is great burning hot drivers side is hot for a sec then u hear something change and it goes to warm i also noticed that if i turn it to cold i get way more air out the drivers side .... i checked blend door under glove box what else could cause this? ac also works fine cold out both sides.