hi, battery was dead yesterday morning so i jumped it and it started right up. drove to work. started it 4 hours later and it started right up. i came out about 5 hours after that and dead again. so jumped it and drove home. so by this time i am thinking bad battery. this morning i had to jump it and drive to work. let it sit for 6 hours and then i went out and tried to start it and it fired right up. but i'm still thinking i have to buy a new battery, the real trouble begins i left work went to pick up the kid and i shut it off for about 10 minutes. i started it and pulled away and at the same time i clicked on the air conditioner, as soon as i turned it on it started beeping and said engine overheat, so i turned it off for a few minutes, when i turned it back on everything was normal. about 10 minutes later i was sitting at a read light and it started to overheat again but didnt quite hit the red, the light turned green so i went around the corner and pulled into the parking lot and everything went back to normal. i guess my question would be is it the bad battery thats causing it to overheat. i thought maybe somthing wasnt turning on or not running right. the other funny thing i noticed about 2 weeks ago every now and then when i turn it off a few seconds later the fan will kick on and run for a few minutes. it never did that before. any help or advice would be hugely appriciated. thanks in advance
The only thing that I can think is that the engine is operating at higher RPM than usually to keep the worn out battery charged. If the air conditioning is also on while trying to spin the alternator at a higher RPM, both could also contribute to the overheating, not sure, but my guess. If it is my car, I would replace with a new battery, then see if the engine still overheats.
would definaely replace the battery- although it shouldnt cause an over heat. car throwing a check engine light? my best guess to help you out although is the alternator or the alt belt. your alt runs accessories after car is running- it is probably not charging your battery- which probably destroyed your battery. deffinately check the belt though because it runs your ac as well as your coolant pump. if belt is slipping, both your alternator output and your water pump would be effected as well as your ac ( compresor is belt driven as well) check all pulleys on the things run by your belt as one may be seizing causing the belt to work improperly. if this is the case however your battery has probably lost its ability to hold a good charge.
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