Jeep,
Your the man, another new tool! I think mine has the same fan setup, when the outside temps get warm I can hear the fan cycle on and off and if really hot, it stays on a long time. Let me know if you need help, I can pull the panel and check it out. You have a good idea changing out the head if it works, keep us posted.

By the way, your post was at 12:33 AM and your working on the bus! We're not worthy, we're not worthy....................