Sub Zero dripping noise from freezer when cycles off

Something is wrong for sure. Bring them back under the warranty. Changing an evaporator is a big job, remove the gas, remove and re-solder the new one. Fill with inert nitrogen, and check for leaks, recover the nitrogen and create a vacuum and then add refrigerant by weight.

Have you cleaned the coils?

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.

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

Here are the most common Sub-Zero error codes:

Sub-Zero Error Code EC40: Freezer will not stop running
Sub-Zero Error Code EC50: Refrigerator runs too much
Sub-Zero Error Code EC24: Defroster is not heating enough
Sub-Zero Error Code EC 06: Evaporator thermistor reads inconsistent temperatures
Sub-Zero Error Code EC20: Defrost Bi-Metal Operation is faulty


Larry Rogers
http://sparkleappliance.com/ca/sub-zero-refrigerator-repair-los-angeles

It may be nothing to be concerned about. The water produced during the defrost cycle drains into a pan at the bottom of the refrigerator. This water is then evaporated by heat from the refrigerant coils.

You may be hearing this water dripping into the pan from the tubing that carries it from the inside of the refrigerator.

Hello, your refridgerator in most likely in defrost cycle. the noise your hearing is the water dripping on the hot heater and ice dropping off the evaporator. should only last 15 minutes and then your all set. Mike

We have cleared / de-frosted the drain twice and it keeps freezing up, causing the accumulated ice problem to recur. Should the freezer settings be changed?

Erin,

The water you hear sounds like it's coming from the automatic defroster in the freezer compartment. It runs down a drain tube into the pan you describe under the fridge. The pan is heated and evaporates the water.

Just some possible explanations if you are hearing "lots" of water"

* You may be in a warmer, more humid climate
* The temperature and humidity in your dwelling is elevated
* The door gasket on the freezer may be leaking
* The freezer is too full
* The freezer door is not closing properly
* The freezer door is being left open for extended periods
* There is a problem with the defrost cycle

If you are hearing water running all the time, check the ice maker water line and fill valve (if you have an ice maker) - there could be a leak or other malfunction.

Has this fridge got an ice maker???
Because ice makers require a water supply to make ice.
This could be where your water is coming from.