It is under warranty.
Now I realize I have done a stupid thing. I drained the spa since the water needed changing and left it in that state while I investigated the panel issue. The remaining water froze in the system. I thought enough of it would drain out that any residual water would not do any damage! I put water back in and it started it up, thinking we could use the spa because it had worked before, even with the dead panel. A connector ring on one end of the heater was cracked but I tightened it and it stopped leaking. Everything else seemed OK. With a minimal amount of water in the spa, I powered it up. It started blowing air into the tub and I thought the pump was working, but I don't remember seeing water movement (there were lots of air bubbles). Shortly, it blew the F7, 30 amp fuse. The component diagram does not say, but I assume this fuse is for the main circulating pump motor. I made sure there was no residual ice still in the system by pumping hot water directly into the primary filter's return hole. The spa water read 73 degrees, by the time I had topped off the tub. I tried again and it blew the fuse again.
What should I expect to find? Is the impeller/pump assembly likely damaged and making it difficult or impossible for the motor to turn it? Does anything else runs off this fuse?