When I attempt to start the pump:
- Motor hums for a few seconds
- Circuit breaker pops
I tried opened the downstream bleed-air valve and it was enough to allow the pump to start turning and then it appears to have run fine. Water flow (based on eyeballing the spill over into the pool from the spa) appeared to be normal & the pressure at the filter also appeared normal. But, if it's left alone ... it won't get going by itself.
I also opened the strainer on both this pump and the waterfall pump. I can turn the waterfall impeller by hand but I am unable to turn the pool pump's impeller by hand. If I put a wrench on the back of the pump motor, I can turn it fairly easily. So, the impeller isn't jammed but it does seem to turn hard.
Recently, I had a control valve actuator go bad and the system ended up draining the spa overnight and running the pump dry - no idea for how long. If it matters, it wasn't hot out (in fact, it was the Freeze Protection mode that kicked it on at night).
Does it sound like I just have a bad start capacitor? Or, is the pump binding for some reason?