Ice is accumulating on the bottom of my freezer.

Obviously that freezer is not achieved the required temperature. There are several reasons for that:
- Defrosting system is not working, which leads to accumulation too much ice on the evaporator that prevents heat transfer and reduces air circulation despite the fan is running.
- The problem with draining condensate after defrosting cycle which also leads to accumulation of ice.
- Leaking gas from the cooling system (reduced cooling capacity)
- Faulty compressor

Dado

Sounds short of refrigerant or very blocked up condenser. Is there a lot of heat from the back/ underneath>

There's a little timer switch in the back. Turn it clockwise until it clicks. The freezer will turn back on.

I believe that the defrost system has malfunctioned. There is a timer that cycles the automatic defrost. The timer shuts off the freezer and turns on a heating element. Then it will cycle back to freezing. If anything goes out in this system the unit will not defrost. over time the cooling fins and below will fill up with ice and the fan can no longer recirculate air so the bottom becomes ice and the top warms up...

Defrost drain is clogged. This accessable thru the back wall of the freezer. Also depending on your model some also have removable Bottom floors of freezer that also get ice accumulation. When the defrost drain gets clogged water from the defrost cycle has no where to go so it stays and accumulates ice till eventually it leaks into the fresh food section. Clear the drain completly and you will have no more problems.

Hello. If your freezer is not a self defroster, you must have had a power failure for a few hours that caused a melt with water ending up on the floor of the freezer and then refreezing. IF you have a self-defrost model, your defrost cycle produces some water which should make it's way down to the evaporator tray just above the floor... in your case, the small hole in the floor is plugged and the water is accumulating on the floor rather than making it's way to the evaporator tray. The fix is to clean the evaporator tray, defrost the ice with a blow dryer, locate the hole and clean it out with a couple of pipe cleaners or cotton swabs. Regards, Joe
PS please rate my answer. thank you.

If it's a frost free model, it could be caused by a plugged defrost drain. Every time it goes through a defrost cycle the water is supposed to drain into the compressor compartment. You can defrost it by unplugging it for a day or two and then remove the panel covering the evaporator coil. You should be able to see the drain tray under the coil and find out whats blocking it.

if self defrosting model check frozen drain in freezer

Frost Free Freezer have an automatic defrost, which is essentially a heating element which melts any ice. If your door seals are in poor condition or something is preventing the door from sealing the ambient air may be melting the ice more than the drain can accommodate. Check the drain in the bottom of the freezer. Humidity can also cause more water to accumulate, especially if the door seals are not sealing.

Causes:

High humidity in the immediate area causing condensation to freeze at the door opening

A frozen defrost drain line not allowing water to drain off when the unit is in defrost

A bad door gasket causing an air leak

Some freezers have a heated perimeter to reduce condensation. If the stop working, moisture can accumulate arounf the door perimeter and freeze.

Leaving the door open too long or something obstructing the door