Pool and Spa
Questions about Pool Repair? Ask an Expert Online.
Well it sounds to me like you have a weak breaker. When the old pump would run on low speed it was pulling very few amps probably like 4 amps, once high speed pump kicked in the large amp draw made it trip. Now you put a new pump in and the breaker will not even stay on, so I would go buy a new breaker and replace it then test you should be good.
I dont think it is anything to worry about yet. When you turn on power the circuit board tries to boot up then the pump 1 will come on and lastly the heater but with a weak breaker it may not get the chance to boot. It could be something in the spa that is causing the trip but usually a breaker trip that is immediate is a weak breaker so putting in a new breaker solves that possibility then we move onto the inert's of the control system. Heaters are known for tripping breakers as well. You can try disconnecting the wires on the heater and putting electrical tape on them and try resetting breaker.