The tub is marked "Pacific Marquis", although I don't believe it is a spa from http://www.marquisspas.com. What is more important to me is the "pack". There is a sticker on it "Baker-Hydro" model 18B3710-E. The tub model AV-32-1-Y-070015. All I find on the web are cartridges... no packs, parts, or tubs. I would love a schematic if anyone can relate to this tub. I'm guessing 10-12 years old.

I have proper power to the tub, high limit is not tripped, GFCI is not tripped. The "air receiving relays" actuate when the buttons are pushed. I can see the micro switches and relays move. Still no power to the pumps. One pump is 230VAC (two-speed), the other is 120VAC. I've allready taken them in, and I watched them both power up and run fine on the bench. Any help would be appreciated.

I was wrong twice in my last post. It is a Marquis spa. And, I did not have proper current to the pack. 110V on the black, 0 V on the red. I discovered a splice in the line and one of the 110V lines was broke. Tub ran for two hours and tripped the GFCI, I guess I'll be reading that Forum next.