My 2006 basic model has had heart problems every time I go up hills I have to run the heart full speed I replaced the fan,the themo, and senor twice. I have 130 mils I think it might be my water pump nothin leaks and the cars runs great even at idea on super hot days outside my car temp starts to go up a bit without going to far I won't go up big hills on super hot days.I have no clue what's up it not the head gastric the car runs great no issue no water in the oil. Any suggestions I was thinking lower themo housing or water pump no codes come up and a few people can't seem to figure it