My cousin owns an 2002 Ford Explorer that had the battery exploded while starting up. It was replaced with a new, however while driving the vehicle, the temperature rose all the way to the H. We pulled over to look under the hood and saw that the coolant had backed up into reservoir and had overflown leaving the radiator empty, also, the a/c started blowing hot air. Trying to drive it to a safe location, the automatic transmission began to slip while shifting by it self. So, on the roadside is where it remains until sunlight.
My reason for posting is things that my cousin said to me. She was told by the dealer to never start the engine with a/c switch on nor run the a/c while going up hills and mountains. Another certified mechanic echo those same statements and added that the a/c shouldn't be set at max. He said that ignoring those warnings will cause the engine to blow. When the battery blew up the a/c switch was on and I'm thinking not only the battery blew up.
Have anyone heard about this and have any feedback. I'm not trying to fix the car, but understand why so much problems, all at once.