I have an EM-100 spa equipment module. About a month ago we went on vacation and came back to the spa not running. I went and reset the breaker in the house, the high temperature reset on the spa itself was fine. Anyway everything would work fine until the heat kicked on then the breaker inside would reset. However now even with the heater turned off the breaker inside the house resets soon after or right as the pump is kicked on. Anyone have any suggestions? Thanks in advance.

Brian,
By your turning the heater off, do you mean putting the toggle switch in the "B" position (no heat)? If so this only turns the heat off in low speed. When you turn the jets on high speed the heater still can turn on, if the thermostat is calling for heat. My guess is a bad heater element.