Dead Battery Dash Fan question

[starbiker99]

I was part of another dying battery thread but thought I would start this because I wonder if I found my issue. My X5 had dead battery again today for the 5th time so I went and bought a new battery. It starts like a dream with the new battery. I backed it in the garage after a drive and left the hood up. I just went out and its been about 2 hours and I can hear a fan in the dash kicking on and off every so often (very faint). Could that be what is running my battery down. The park light goes out after 16 minutes so I thought it was going to sleep but the fan still seems to spin. Is there a reason for it? I can watch the voltage with my meter and it drops about 7 hundredths while the fan runs for about 5 seconds. Does anyone have an idea what it is running for? Thanks!

Edit I just tried a few more searches and it looks like a possible hvac module issue. I will research that tomorrow after i get home from work. Sorry for cluttering posts!



2002 X5 4.4 born 08/02 93K miles.