Please help!

Ok, about a week ago I went out to my grandpas farm to drive my E-Maxx. It was really dusty, and I think the dust ruined my fan. Now to my question, will the Mamba Monster V3 arm when the fan is broken? If I use compressed air to blow on the fan the esc will arm, but when I only flip the switch nothing happens. No lights and no tones. Is something wrong with the esc or is it just the fan? I'm really upset, and I can't wait 4 weeks for Castle to repair it. Please help.