W9 issues

[Wiseman]

Did you actually clean the heater core and evaporator ? Do you see clearly through them ? Is the actuator working properly not only on dashboard but also inside the box .
The only thing I can think is reversed polarity on the blower . It will still blow , but with weak air flow . In the same time you stated the problem existed before cleaning and replacing blower . Check also for a popped out air ducts , worn/missing foam seals .