I bought a 2018 C-Max 2 months ago, last week I was pushing buttons and sent the fan high. I heard and felt a vibration that shook the whole dash. The dealers shop said is was a blower motor and ordered one. Today I found out the vibration was caused by a rodent nest in the blower fan. This isn't covered by the warranty. I have lived in the South and have had multiple vehicles for over twenty years. I have never had a rodent breach the passenger compartment of any of multiple brands of vehicles. Is this a design defect in the Escape and C-Max body styles? Can anything be done to prevent this entry? Blowing hot or cold air over rodent feces and urine cannot be healthy, ie: Hantavirus Has anyone reported this source of infection to the CDC? bill a.