Types of Freezers
These offer options typically with adjustable shelving, and allow less installation room than a chest freezer. Does offer easy organization and at a quick glance you can see what you have, though these do offer slightly smaller usable space than the chest freezer.
Offers great storage capacity for large and odd sized items. Downside of these is the stacking type of organization as well as the constant bending to see and grab what you have.
This can cause frost build up and reduce capacity. A cause could be dirty evaporator coils.
Many issues can cause the unit not to cool, here is a list of just a few. Location is to hot or humid, temperature controls were accidently nudged, bad door seals, compressor issues or an overly packed freezer blocking the rear vents.
Making Loud Noises
This could be the compressor motor is starting to fail, or the fan is in need of replacing.