I recently replaced a 1 hp single speed motor with a B2980 which is a two speed 3/4 hp motor. The new motor is only running in low speed. Originally I wired it with one hot to the "com" and the other to a switch which fed "hi" and "low" terminals. In either position, the pump would only run on low speed. I even disconnected the switch and wired it to just the "com" and "hi" settings, the pump still runs on low (with no connection to the "low" terminal at all). I tested my power going to the pump and confirmed the voltage on both "hot" lines. Any thoughts? Did I get a bad pump that I need to return?