I've got a approximately 2 year old Hayward Power Flo Matrix 1 hp pump. Yesterday I noticed that the pump had tripped breaker (it's practically alone on the breaker, ocassionaly some lights ). When you reset the breaker the pump will run and move water, but it sounds like it's running bogged down and within 30 seconds will trip the breaker again. I felt inside the housing and it doesn't feel like the impeller is blocked and the fact that it is moving water leads me to believe the impeller is moving.
Matching hayward sand filter and pressure gauge reading between 10 and 15 psi which is normal for my AG 18ft round pool.
Where should I start?
Thanks in advance.

Brian