Question about Sub-Zero Freezers

1 Answer

I have a sub-zero 642 sidebyside (10yrs old). Fridge recently stopped cooling and required replacement of evaporator. Coils and condenser were thoroughly vacuumed. This was done by a factory rep. Now I find that every day or two, the freezer temp jumps up to about 7-10 degrees (setting is at 0-degrees). And, sometimes 'vaccuum condenser' warning comes on indicating overheating. The center frame (separating freezer from fridge is very warm but not too hot to touch, condenser fins do not seem too hot, but overhead compartment where condenser is located seems quite warm). This is a built in unit, so each time I notice freezer acting up, I pull off cover grill and look to see if condenser fan is running (it is), but presumably if it is failing on an intermittent basis--this would have occurred before I notice the higher freezer temp and so I may be missing the time period when the fan motor is not running as it should. Any ideas on what the problem might be -- I plan to replace the fan motor as a first move to eliminate that as a possible source of the problem.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Guru:

    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 1,524 Answers

When they replaced the evaporator coil they had to re-charge the unit. Sounds like there may be a small leak.

Posted on Aug 23, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My freezer drawers are very warm All food defrosted smells horrible even after cleaning. Should I clean condensor, temp is not cooling?


It is likely the condenser fan is not functioning, or the condenser is dirty. You may need to open the compressor access panel to check. If you can hear the compressor running, and the condenser feels warm, the fan should be running. If it isn't, it probably needs to be replaced. Another symptom is the area around the doors feels warm.

Jan 01, 2013 | Sub-Zero 700 Refrigerator Freezer...

1 Answer

Sub Zero 700 suddenly stops after 12 years. Compresser is burning hot.


The compressor will normally be 100 to 110 degrees. I would suspect the thermostat or mouse damage in the freezer area. Also, if you keep it overstocked, to the point of poor air circulation, you could just have ice blockage. Put the frozen food in a styrofoam cooler or a good heavy corrugated box and give the unit a good full defrosting.

Dec 15, 2012 | Sub-Zero 700 Refrigerator Freezer...

1 Answer

My freezer is not cold. The temperature dial reads 1-5 then an igloo and a snowflake. Do I put it on the snowflake to get it cold or the igloo?


Hello,

Insufficient cooling is a fridge repair job that you can do without the help of a professional. Often the fridge has a frost-free failure, or the compressor is faulty but there are many other reasons for a fridge not cooling properly.
Step 1 - Find the Problem

Your first job is to locate the source of the problem. Consider each of the following:

* Gaskets - Make sure the gaskets/seals are not torn and are sealing properly.
* Evaporator fan - Make sure it is working. If it is now working you may have a problem with the fan motor. Check for power to the motor and also examine the fan switches around the door (not all fridges have these switches).
* Air damper - Sometimes the air damper will not open up to allow the cold air from the freezer part to blow into the fridge section.
* Condenser coils - Check to see that the condenser coils don't have a dust build-up and that the condenser motor is working.
* Compressor - Make sure your compressor is working with on and off clicking noises.

Step 2 - Frost-Free Failure

This is the most common cooling problem in fridges. Expose the evaporator coils by accessing the panel in the freezer section. The coils in the freezer section can sometimes get clogged up with frost. This can stop the evaporator fan motor from blowing cold air around, or cause the fan to hit it and stop, or become noisy. The defrost timer can be a bit tricky to find but it is usually located behind the back bottom corners of the fridge, although they can sometimes be found in the ceiling of the fresh food section, or behind the cold control cover.
Step 3 - Find the Timer

When you find the timer, turn the wheel-like screw slowly with a screwdriver until the fridge shuts off. The refrigerator is now defrosting. If you find that the fridge starts now, you will need to replace the defrost thermostat and the defrost timer.
Step 4 - Volt Test

If the heaters do not come on, use a volt meter to ohm test the defrost heater or volt test for 120 volts to the heater. You can bypass the defrost thermostat if you haven't got power to the defrost heater to check if the defrost heater will come on. To bypass the thermostat, join the two wires together. Replace the defrost thermostat and the defrost timer if the heater comes on now.

If there is a ticking or squealing noise in the defrost timer, or it seems hot to touch, replace it.

Many fridges have and inline fuse on both sides of the defrost heater. You will need to replace the whole heater if one of those fuses blows. Check these fuses with a volt meter if the defrost heater doesn't work.

A quick check if you have a cooling problem is to inspect the evaporator coils. If there is a build up of white snow on the coils, this indicates a frost free problem; if there is balled ice on part of the coils with the rest bare, this indicates a system problem, like a problem with the pumping compressor.
Take care in solving the problem....

May 01, 2011 | Whirlpool 19.6 cu. ft. / 555 liter Upright...

1 Answer

Sub Zero ice maker (Model 235) not making ice, warm inside


try first. condenser ciol clean. is the water cold? is cutter grid in god shape? the brackett under the evaporator is attached?

Apr 02, 2010 | Freezers

1 Answer

Freezer is not cold and evaporator fan (inside


ok well... those pipes coming from your compressor one of them should be hot. if not your compressor is not running.

Nov 10, 2009 | Amana Freezers

1 Answer

Why does it get hot on the front and the sides it never did that before


If the food is at normal temperature, then what you are describing is normal.
On a chest freezer the condenser coils are embedded in the outer walls, as the evaporator coils are embedded in the inner walls to provide cooling.

This is the very basic principle of refrigeration. One set of coils (the condenser) are allowed to get hot, so the other set of coils
(the evaporator) can get cold.

When the unit is not running, which is most of the time, the walls will cool to room temperature.

Nov 03, 2009 | Haier 7 cu. ft. / 198 liter Chest Freezer...

1 Answer

COMPRESSOR RUNS, AND IS HOT TO TOUCH, FREEZER WONT STAY COLD IF O


either your evaporator and condenser coils are very dirty or your low on r22 freon

Jul 31, 2009 | Freezers

1 Answer

Sub-Zero model 550 does not cool properly


make sure the coils are clean first both coils, then check the r22 freon

Jul 21, 2009 | Freezers

1 Answer

Freezer wont freeze, compressor always running, refrigerator not cold


HI,

If the refrigerator isn't cool, you need to answer some questions, then see if the compressor is running.

First, answer these questions:

  • Is the refrigerator completely dead? If so, see “It's stopped completely.”


  • Is the thermostat knob turned to the proper setting? If not, reset it.


Next, see if the compressor motor is running

The compressor is a football-sized case with no apparent moving parts. It's on the outside of the refrigerator at the back near the bottom. If it is humming or making a continuous noise and your refrigerator is still not cooling, there may be a more serious problem with one or more of several different components, we recommend contacting a qualified appliance repair technician for further help.

If the compressor is not running but you do have power to the refrigerator, there may be a problem with one or more of these:

  • The compressor


  • The Thermostat


  • The overload, relay, or capacitor


  • The defrost timer


  • The condenser fan motor


Cooling is poor For an overall understanding of how refrigerators should work, read about refrigerators in the How Things Work section of our website. A refrigerator or freezer that is cooling, but cooling poorly, may have a problem in one of several areas:

Evaporator coils
Condenser
Poor cooling is often the result of a heavy frost build-up on the evaporator coils or a condenser that is clogged with dust, lint, and dirt.

Evaporator coils Poor cooling is often the result of a heavy frost build-up on the evaporator coils. You can't see these coils without removing a panel on the inside of your freezer. A sure sign that there is a build-up is the presence of any frost or ice build-up on the inside walls, floor, or ceiling of the freezer. Such a frost build-up usually indicates a problem in the self-defrosting system or damaged door gaskets.

The refrigerator is supposed to self-defrost approximately four times in every 24 hour period. If one of the components in the self-defrosting system fails, the refrigerator continues to try to cool. Eventually, though, so much frost builds up on the evaporator coils that the circulating fan can't draw air over the coils. There may still be a small amount of cooling because the coils are icy, but with no air flow over the coils, cooling in the refrigerator compartment is quite limited.

Here's an inexpensive, though inconvenient, way to determine if the problem is with the self-defrosting system. Remove all of the perishable food from the refrigerator and freezer, turn the thermostat in the refrigerator to Off, and leave the doors open for 24 to 48 hours. (Be sure to have several towels ready in case the melting frost and ice causes the drip pan to overflow). This allows the refrigerator to defrost "manually." When the frost and ice build-up has completely melted away, turn the thermostat back to a normal setting. If the refrigerator then cools properly, it indicates a problem with one of three components in the self-defrosting system:

  • The defrost timer


  • The defrost thermostat (also called the bi-metal switch)


  • The defrost heater


If it still does not cool properly, there may be a problem with the refrigerant level or the compressor. You may need to consult with a qualified appliance repair technician to further diagnose the problem

Condenser Self-defrosting refrigerators all have a set of coils and a cooling fan, usually under the refrigerator, that need to be cleaned regularly. If these coils get coated with dust, dirt or lint, the refrigerator may not cool properly. The coils may appear to be a thin, black, wide radiator-like device behind the lower kick-panel. To clean them, disconnect the refrigerator from the power source, use a refrigerator condenser brush (see the Appliance Accessories section) and your vacuum cleaner to clean the coils of any lint, pet hair, etc. You may not be able to get to all of the condenser from the front, it may be necessary to clean the remainder of the condenser from the rear of the refrigerator.

Jul 03, 2009 | Traulsen Freezer Refrigeration 4 - 1/2...

Not finding what you are looking for?
Freezers Logo

Related Topics:

256 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sub-Zero Freezers Experts

John Tripp
John Tripp

Level 3 Expert

4654 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

AJMAL KHAN

Level 2 Expert

382 Answers

Are you a Sub-Zero Freezer Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...