I have an old Hot Springs Highlife Model K that trips the main breaker as soon as it is powered up. Initially, it looked like a heating element had blown, so that was replaced. Same issue. I opened the control box and found a cap inside that was cooked. Replaced that cap and the heater reset switch. Still no luck!

Does anyone have a schematic for this or have any suggestions?????

Was it working before and stopped working, or has this spa just been wired somewhere new?

It was working before. Have triple checked wiring and incoming voltage.

For starters, you can try unplugging components one at a time, and see if the breaker still trips.

Tried that. With nothing plugged in, the breaker still trips. So, it is somewhere inside the evil black component box. Switch.....relay......something??????

Disconnect the wires from the breaker. Does it still trip? If so, the breaker is bad, or wired incorrectly.

If not, look for burnt wires, a burnt surge protector, a stab in the dark would be a rectifier

The only thing that I saw burnt in there was a cap that went across two contactors. I replaced the cap and the heater reset switch that it looked like it went to. Other tahn that, nothing looks burnt. Without a schematic, I can't figure out what voltages I should have where.