I just got an older Seal Jumbo 150 dry mount press in 16" x 20" size. When plugged in and turned on, the red light blinks, temperature seems to come up, but I don't get a green light and the temp setting rheostat doesn't seem to function to affect the heat cycle. It seems to be in good shape, clean, good platen and pad. There are no obvious signs of neglect or abuse and it is definately sturdy. Does anyone have some experience with this press? I would like to correspond with someone who has used this type of press and could answer a few questions for me. If there is a problem, I can probably trouble shoot and fix the thing, but I would like to know what "normal function" is and how it should behave before I start to tinker with it.