Disssapointed to find it is bigger than my previous range hood so I have a gap where it slides in and out .couldnt do anything about it as the Electricion had started screwing it in

The unit was installed and I haven't checked if one motor was jammed. Now it's 1 year so I cannot do anything. The motor was not working since the start because I can see no oil marks on the top of the unit. I wasted money on unit the installation guy asked more for checking.