ok, i noticed my car running a little warmer than usual. and this past weekend on my way to ft worth from houston my thermostat almost pegged out, then it went back to normal. so i pulled over and checked everything. my coolant level is fine. radiator isn't leaking and has good pressure. radiator fans are running fine. thermostat looks ok. what else could it be? and now my battery is dead. wtf can anyone help me out?