When working on your unit becareful. See below link

Man saws arm to save his life after being trapped under basement furnace for three days (http://www.nydailynews.com/news/national/2010/06/11/2010-06-11_man_cuts_off_his_arm_to_save_his_life_after_bei ng_trapped_under_basement_furnace.html)

Hi, hvac1000!

Wow! That poor man!

I'll make sure that when I work underneath something heavy, that someone knows that I'm doing that!

Thanks!