So my wife found a 1991 sun dance Marin spa system 600 for $100 (hopefully not regretting this). The current homeowner said the previous owner said it was running but it needed a $50 part, as it wasn't heating up.
I'm new to these things, but I am electronically enclosed and somewhat mechanically inclined, so I'm going over the wiring to get familiar with it. I just tested the switches on top and they all work except for std/Econ and I'm not sure if the heat on/off switch is working. All knobs seem to turn ok.
Now for the questions.
Does it have to be full of water to test if the unit will power up and do a quick test to see if the pump will spin?
I am familiar with Bbb, do I run chlorine or bromine? I am not familiar with bromine.