AISIN WQT-800 inverter pump failing within a year?

A year ago December, I posted saying a cheap inverter pump was failing after a couple months ( Any way to keep inverter pump alive once it starts croaking? | PriusChat ) , and everybody said I should replace with OEM, and so I replaced it with an AISIN WQT-800.

11 months and merely 3000 miles later, this AISIN pump is making that hallmark wheekoo wheekoo electronic pumping sound my original Prius pump made before it failed.

When I put in the AISIN, I bled the air out of the lines and mostly swapped the coolant (a hose clamp failed and drained most of the coolant, but I didn't drain the rest out of the bottom).

Should I completely drain the coolant and fill with new coolant? Would that rescue this pump? I feel that this pump is failing very early for its reputation.

If the coolant is in fact contaminated with particulates and such, would replacing the coolant do much to prevent this pump from failing, or should I just replace it (again) AND change all the coolant?

The reservoir is turbulent in ACC mode (orange light, engine off), and the pump is making its normal hum, indicating the pump is still working. It's just begun to do the electronic croaking (I've heard it now 5 or so times) if at a stop light after driving above 50mph (at least that seems to be the pattern).

 

I ordered it from Rock Auto and it was the model that members of this forum were recommending.

Are you saying that once it starts making that wheekoo wheekoo struggling pump sound that it's pretty much inevitable that it's on its way out?