I don't know how CC set theirs up, but Liberty has a foam or woven metal mech (washable) filter mounted on the intake side of the evaporator coils. Due to variations between coaches, I can't even guess where your evaporator units are located (I can't even guess where some other Liberty evaporator units are) but when you get access to them you should clean the filter and keep it clean, make sure your coil and fins are clean, and put a drop of oil in the motors.

But don't stop there. Access your condenser unit coils and flush or blow any accumulated dust or dirt from them as well.

Someone that has a CC will possibly be able to give you a heads up about where to look. I don't know of any other way to find them other than to listen to where the fan is blowing and start taking panels out.