Our landlord just put in a brand new AC unit in our townhouse and it works great except for one bedroom (size 9X10). The whole entire house gets really cold except for this one bedroom. We've checked and the vent is definitely blowing out cold air but the room just never keeps cool.

Does anyone know what the possible issue is here? I'd like to try to fix the problem before getting the landlord involved if possible.

Thanks!

Get the duct work fixed. You need more air into that room.