The GE FUF14DLRWW and the FUF21DLRWW are the same kind of freezer in two sizes: a white, frost-free, garage-ready, ENERGY STAR upright with adjustable wire shelves and a door alarm. The FUF14DLRWW holds 14.1 cubic feet and the FUF21DLRWW holds 21.3 cubic feet. Because the model pages describe the smaller one as the same platform as the larger, the choice is mostly about how much frozen food you store and how much floor space you have, not about features.
What is the difference between the GE FUF14DLRWW and the FUF21DLRWW?
Capacity is the difference. The FUF14DLRWW is listed at 14.1 cubic feet and the FUF21DLRWW at 21.3 cubic feet. Everything else on the two model pages matches: both are white, frost-free uprights, both are rated for garage use, both carry garage-ready temperature compensation, adjustable wire shelves and a door alarm, and both are ENERGY STAR qualified. The pages do not list a difference in the controls or in the cooling system, so we do not claim one. The larger freezer will be taller or wider, so check the cabinet dimensions on the specification sheet before you decide where it will sit.
Think about how much you freeze. A household that buys a side of beef or fills the freezer with batch cooking will use the larger one, while one that adds a few shelves of overflow from the kitchen refrigerator is better off with the smaller unit. Our GE chest or upright freezer buying guide compares the two formats, and the GE FCM7SKWW chest freezer guide covers a chest model.
Does garage-ready matter for these GE freezers?
It can. Both the FUF14DLRWW and the FUF21DLRWW are listed as garage-ready, which means they have temperature compensation for a space that swings with the seasons. The two other uprights in the GE line on this site, the FUF17SVRWW at 16.7 cubic feet and the FUF21SVRWW at 20.5 cubic feet, are listed as frost-free uprights with an interior light and a power-on indicator, and their pages do not mention garage use. If the freezer is going to live in a garage, a shed or an unheated porch, choose a model that the manufacturer lists for it, and check the exact temperature range for the unit in the specification sheet.

What problems do owners of these GE uprights run into?
The model pages give a short list. For the smaller unit, most service calls trace to the defrost heater or timer, or to a worn door gasket that lets in humid air. For the larger unit, a freezer that runs constantly or will not freeze usually points to the start relay, the thermostat or a failed defrost heater. The electronic uprights can also show E7, a button stuck for more than 30 seconds, E8, a shorted thermistor, or E9, an open thermistor. We have a page for each: GE freezer E7 and GE freezer E8 and E9.
None of these is a reason to avoid a model. They are the reason to look at the gasket and the frost on a used unit, and to know what to do if the freezer does not hold temperature. Our GE freezer not freezing guide is the first stop.
How do you set up a GE upright freezer?
Leave space around the cabinet as the manual describes, level the freezer with the feet, plug it into a grounded outlet of its own and wait for it to reach temperature before you load the food. A freezer in a garage needs an outlet that is safe in a damp space, so ask an electrician if you are not sure. Our GE freezer installation guide goes through the sequence, and the GE freezer maintenance guide describes the care that keeps it running.
How should you plan the space for an upright freezer?
Measure the spot, the door swing and the path the freezer will take to get there. An upright freezer opens like a refrigerator, so the door needs room to swing past the shelves and to open wide enough for a drawer to slide out. In a garage, keep the freezer away from a car bumper, a water heater and a door that opens into it. Allow the airflow space the manual lists around the back and the sides, because a cabinet jammed against a wall works harder. A flat, solid floor matters too: a freezer full of food is heavy, and a tilted cabinet leaves the door out of line and the gasket open.
Plan the inside as well. Group food by type on the adjustable wire shelves, keep the bins for small items and rotate older packages to the front. A freezer that is organized is opened for less time, and every minute with the door open lets in humid air that turns into frost. The door alarm on these models is there to warn you when the door has been left open, so do not ignore it.
Which one should you buy?
Choose the FUF14DLRWW if you have limited floor space, an overflow need or a smaller household. Choose the FUF21DLRWW if you need the larger capacity and have the room. The FUF17SVRWW and FUF21SVRWW are not listed as garage-ready on this site, so for a garage check the manufacturer’s specification sheet before choosing one. If you are looking at a used freezer, ask for the model and serial number, check the gasket for tears and the walls for frost, and listen to it run through a full cycle. You can book a freezer repair visit if you want a technician to inspect a unit before you buy.