V2 toolhead fan question

When does the small blower fan on the v2 toolhead turn on? I think I’m having a heat creep issue and plan to diagnose it more in depth in the morning. Is it on any time the heater is on? For some reason that’s what I’m thinking. Thanks, Greg.

If you are talking about the little radial fan, it starts running as soon as the control board powers on and 5 volts is supplied to the fan leads.

Yep, that was it. It wasn’t working, but started working once I started digging into it. Thanks.