The 30 amp fuse for the blower motor has to be removed in order for the car to stop blowing air when the 2005 Impala is shut off and to also keep it from draining the battery. When the fuse is placed back in, the car can then continue to have heat in it. This came all of a sudden. Not sure what to do to fix this issue, but it is for my daughter's car and she works two jobs and goes to school full time. Any help would be great. Thanks!