According to the product description, the shelves are not able to be adjusted. It's possible that there could be a problem with frost. If this happens, one solution is to put a flashlight inside the freezer, shut the door, and turn off the lights. If light is visible coming out of the freezer, it may indicate that there is a gap in the seal. To fix this, you can unscrew the hinges at the bottom of the door and gently tap the plate towards the freezer to align the door and eliminate any gaps. This method worked successfully for me.