I have an older side by side sub-zero.The freezer is icing up .It appears to be coming from the top inside of the unit where the fan is located.

the fan is not circulating the air flow due to ice build up?

Yes the drain is on the right side top of freezer. There is also a drain behind the drawer, center of rear wall inside the refrigerator.

The freezer side may be icing up. Soon enough the fridge side may have problems, too. Love those Sub-Zeros, but if the defrost timer fails, it will ice up. Defrost timer is up top. A generic one will do.

Hi,

The freezer section has its own fan and the fridge has its own fan motor. The two systems are separate from each other and does not share air. The Fan in the freezer is located behind the ice maker in the freezer section.

I hope this helps.

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

The evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the inside of the freezer at the bottom of the rear cover.

sounds like your evapartor fan is going out? This is located inside the plastic shell inside your freezer.

try replace the cheapest part first.( vater valve). you only need 2 components to make ice. water valve and ice maker.is simple and easy water valve located in the bottom part of the unit. remove the kick plate. left side. and color blue. ice maker inside the freezer. (DISCONECT POWER BEFORE SERVICE. ALSO TURN WATER SUPPLY OFF.) try main box , garage. and water meter outside your house. good luck

Buttom freezer Sub Zero. Replacing evaporator for fresh food section.

There is a fan inside the freezer and possibly the fridge. It circulates the cold evenly throughout the unit. The fan may shut off with the door open so hold the door switch in to see if you hear the fan. It's behind the rear cover on the inside.

You probably need to defrost freezer - frozen moisture possibly stockedevap. fan motor in the freezer. Turn it OFF for 24 hours and start itover. Make sure no moisture condensation on the freezer compartmentsurfaces as walls and shelfs. If so wipe it out. Pull out and remove upper basket from the freezer, push fan switch which is located almost under ice maker.You have to hear evaporator fan motor start working. Still not work? Call to professionaltechie! Good luck! :)






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