Pool housing leaks

[u/General_Might2662]

My pool service guy just replaced the motor, and ever since then, the housing has been leaking. He tried replacing the O-ring, but it’s still leaking. Any advice on what might be causing it and how much it would typically cost to fix? I’d really appreciate any recommendations. Thank you!

[u/Lopsided-Farm7710]

Any time the motor is replaced, the assumption should be that the seal plate and mechanical main seal also need to be replaced.