Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

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Sub Zero dripping noise from freezer when cycles off

When the fridge cycles off I hear a constant dripping sound coming from within the evaporator section of the freezer. As soon as the compressor kicks in the dripping sound stops. Everything is working fine although there is sweating underneath at the back right. The fridge is 12 years old and has had the fridge evaporator replaced as is commonplace with the 650 series. Any ideas?

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Is this noise periodically or every time the fridge cycles off? Does it sound like water dripping on a hot surface?

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Posted on Dec 05, 2012

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Posted on Jan 02, 2017

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SOURCE: sub-zero 650 / bottom freezer

Clean fluff from condensor, turn off overnight and defrost, turn back on following day should start to work ok within 24hrs. Regards Advisor

Posted on Aug 23, 2007

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SOURCE: sub zero 650 fidge holding at 53 degrees

Most likely you have a leak in the evaporator. Subzero warranties the parts for 12 years. Call them to find out what they will cover. They are agreat company and will be fair with you.

Posted on Jul 19, 2008

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Posted on Jul 23, 2008

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SOURCE: Correct temperature for freezer & fridge

fridge should be about +4degC and freezer about -18degC

Posted on Sep 25, 2008

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SOURCE: sub zero freezer too warm

I believe the freezer has to get down to 7 degrees or lower for icemaker to harvest. Clean your condenser and blow it out. If that doe not fix it you will need service for sealed system

Posted on Oct 08, 2008

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1 Answer

1988 sub zero refrigerator's freezer is warm on the top and not making ice


Hi,
Sounds like you have a fan problem around the evaporator in the freezer, it is possible it has failed and won't move air within the freezer section anymore. Cold air drops and heat rises.

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I have a sub-zero fridge/freezer model #550. I inherited this unit when I recently purchased my home. The problem I have is that water dripds in the freezer area on the right hand side opposite from the...


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.

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Water leak and noise are due to wrong temp setting or malfunction of defrost cycking.Keep temp setting between 3 and 5 degree centigrade. Due to over frosting, the freezer fan fan hits over the ice and working to cool fridge compartment.And also check defrost timer, and heaterworking properly to defrost in time. And if your ice maker is making sound, due to:
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  • Rattling noises may come from the flow of the refrigerant or water line. Items stored on top of the ice maker can also make noises.
  • The high-efficiency compressor may make a pulsating or high-pitched sound.
  • Water running over the evaporator plate may make a splashing sound.
  • Water running from the evaporator plate to the water reservoir may make a splashing sound.
  • As each cycle ends, you may hear a gurgling sound due to the refrigerant flowing in your ice maker.
  • You may hear air being forced over the condenser by the condenser fan.
  • During the harvest cycle, you may hear a "thud" when the ice sheet slides from the evaporator onto the cutter grid.
  • When you first start the ice maker, you may hear water running continuously. The ice maker is programmed to run a rinse cycle before it begins to make ice.
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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.

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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

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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?

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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
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* 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

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