I live in a doublewide and only half of the house is getting cold air the other half nothing comes from the vents

How do you get under the floor? Sounds like either a second fan stopped working (wire broke or something) or a duct fell out.

Thank u

A doublewide usually has 2 main ducts since the modules separate. Go under the DW and look for a disconnected transfer duct or a loose duct. Since it is in 1 side, it is most likely that.

It is probably your cross over duct that links the 2 sections togetter u sly flex pipe 12in. Dia.