Thanks Guys! If you look back at a post I did back on Oct 4th, I had a similar probelm at home with the "howling fan". Got the MB free, through it in and fixed the problem. I kinda suspected the evap fan was bad but thought of checking the thermo first per the original reply. All good stuff, just have to find some spare time during work to have a look see. I'll let you know what I find.