Electrical - Motor air intake fan on 1998 Volkswagen Jetta

Electrical problem
1998 Volkswagen Jetta 4 cyl Front Wheel Drive Automatic 68000 miles

I have noticed recently when I turn off my vehicle the electrical motor air intake fan stays on, sometimes for up to three hours. The car will no shut off and ultimately kills the battery.

I have looked under the hood and at the user manual but I am not familiar with Volkswagon's Any help would be appreciated

Asked by for the 1998 Volkswagen Jetta