The blower motor runs ALL the time! It won't shut off until I disconnect the blower on the board @ TB-4. So whatever relay controls that circuit is either tacked closed or the driver circuit is shorted. This board looks like a pain to pull out too. I was hoping to get a schematic before I did started that project. I could nail a switch to the side of the hot tub and fix this problem fast and easy but the rest of the family wouldn't like that too much :-).