Unit won't turn on. I have a Fresh Air unit. I cleaned the unit and after I was finished it won't

Question

I have a Fresh Air unit. I cleaned the unit and after I was finished it won't turn on at all. I did notice when I was 1st unplugging the unit the plug was kind of hard to pull out of the back of the unit.I verified the fuse and power cord are okay. The activator clip is depressed. What else can I check?? It's only about 2 years old.Thank you for any help!Kim