kay! so I installs me new Hayward 3/4hp pump, a little plumbing and a little electrical wiring and presto!!! we have an issue. cannot put breaker on when switch is in off position however if switch is on breaker will set and pump starts?? pump runs fine until switch is flicked off then breaker trips. I say pardon!! wouldn't ya think it would be opposite? So i try changing switch and same problem. I used to occasionally have a problem with breaker tripping when turning old pump on but a reset and usually good to go?? Could it be a problem with pump or breaker? 50+yr old house and panel.