Hey guys, I am trying to troubleshoot what is wrong with my brothers 2004 z4 3.0.

The other day it started to get hot while driving home (in Vegas its like 105+ outside right now).

We replaced the thermostat and it still got hot while after awhile.

I think it might be the electric fan, since it won't turn on while trying to diagnose the issue at temp. When I click on the Ac it does 1 revolution and doesn't spin anymore.

Any ideas on how to confirm its the fan or how to troubleshoot further?