A little background:
My RX has no A/C. The passenger's side window wiring is damaged and sometimes doesn't like to roll back up, so I don't use it. In the heat we're starting to get around Seattle this means driving with the HVAC fan on high with the driver's side window open to stay cool.
Last week I noticed that after parking for a quick errand, when I got back in and restarted the car, the blower fan simply refused to turn on. Fan speed doesn't matter, HVAC mode doesn't matter, HVAC temperature doesn't matter.
It seems that if I leave the car sitting the fan will eventually come back to life, but there is nothing you can do in the meantime (once it took a full day to come back, just yesterday it only took an hour).
I did some research, found this thread, but was wondering if anyone has experienced this issue in the past and could save me some troubleshooting time.