Question about Refrigerators

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GE Profile Top-Freezer PTS22LBNARCC Unit was working great using settings 5 freezer and 5 refrig until 2 weeks ago. Now with 5-5 settings freezer goes to -25F and refrig 25F. Evap fan is running and blowing cold air, no problem with not being cold in freezer or refrig. I have made sure that vents at the back of the freezer that allow the cold air into the refrig are not blocked. I have turned unit off for 2+ hours and then restarted unit using settings of 2 for freezer and 2 for refrig. Freezer is about -10F and refrig 25F. Something is defective. How is the air flow between freezer and refrig controlled? I have not checked for ice on the Evap coils because the unit is too cold not warm. There are 3 thermistors, Freezer, Refrig and Evap. Any thoughts

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  • Eugene Aug 30, 2010

    GE Profile Top-Freezer PTS22LBNARCC Unit was working great using settings 5 freezer and 5 refrig until 2 weeks ago. Now with 5-5 settings freezer goes to -25F and refrig 20F. Evap fan is running and blowing cold air, no problem with freezer or refrig not being cold. I have made sure that vents at the back of the freezer that allow the cold air into the refrig are not blocked. I have turned unit off for 2+ hours and then restarted unit using settings of 2 for freezer and 2 for refrig. Freezer is about -10F and refrig 25F. Something is defective. How is the air flow between freezer and refrig controlled? I have not checked for ice on the Evap coils because the unit is too cold not warm.

    Note: This unit does not have have a Mechanical defrost timer. All temperature and defrost functions are controlled by Main Controller board (Old# WR55X10086) (Replacement# WR55X10942) and the Temperature Control board (Old# WR55X10085) (New# WR55X10172)There are 3 thermistors, Freezer, Refrig and Evap, I assume that they connect to the main controller board. Also defrost heater is enclosed in a glass tube. Go to URLhttp://www.pcappliancerepair.com/ and enter Model# PTS22LBNARCC

  • Eugene Aug 30, 2010

    From the GE service manual:
    Freezer Compartment
    Cold air from the evaporator is forced up against the top of the freezer and the back of the
    evaporator cover. It is then discharged through slots along the air tower at the rear of the
    freezer compartment. Air is circulated by the evaporator fan throughout the freezer compartment, where it picks up heat and moisture. The evaporator fan then draws the warmer, moisture-laden air
    through return louvers in the bottom of the evaporator cover. The air is then drawn through
    the evaporator where heat is removed and moisture is deposited as frost.
    Fresh Food Compartment Some of the cold air that is being forced against
    the top of the freezer and back of the evaporator cover is diverted through the lower portion of the
    freezer air tower and is pushed though the mullion hole into the fresh food compartment air
    channel. The air then exits the air channel in the front of the fresh food compartment, creating a
    curtain of cold air along the front of the shelves. The fresh food air channel also has a rear
    discharge to maintain deli drawer temperatures. Air circulates throughout the fresh food
    compartment, picking up heat and moisture. The air is then returned to the evaporator
    through the return air ducts located at the top right and left of the fresh food compartment.

    Note: These refrigerators do NOT use damper assemblies to regulate the flow of air to the
    fresh food compartment. Airflow is regulated by a three-speed evaporator fan and a sized air
    duct system that provide predictable, consistent air exchange rates for each level of fan speed.
    End comment from the GE service manual:

    I understand that this is a difficult problem. I could be the three-speed evaporator fan not running at the proper speed which could caused by the fan or main controller board. I also could be one of the three thermistors, Freezer, Refrig and Evap that has gone bad.

    I was hoping that you had repair history information (typical failure issues) that would help me pin point the problem. I will wait for your reply. Thanks in advance for trying.

  • Eugene Aug 30, 2010

    I understand that this is a difficult problem. I could be the three-speed evaporator fan not running at the proper speed which could caused by the fan or main controller board. I also could be one of the three thermistors, Freezer, Refrig and Evap have have gone bad.

    I was hoping that you had repair history information (typical failure issues) that would help me pin point the problem. I will wait for your reply. Thanks in advance for trying.

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  • Master
  • 2,272 Answers

In order to ensure proper temperatures, you need to permit airflow between the refrigerator and freezer sections. As shown in the illustration, cool air from the refrigerator enters through the bottom of the freezer section and moves upward. Most of the air then flows through the freezer section vents and recirculates under the freezer floor. The rest of the air enters the refrigerator section through the top vent and flows down the back of the refrigerator compartment.
Ensure that none of the air vents are blocked. If an item is placed near a vent, it may block the flow of air to the refrigerator, which may cause temperature and moisture problems. Move the item away from the air vent.
Adding a large amount of food warms the refrigerator. It could take several hours to return to the normal temperature after food is added.
If the refrigerator is in defrost mode, the freezer compartment temperature will be warmer than usual. Allow 20 minutes, and then the freezer should be back in normal cooling mode.
Things to check: The coils underneath clean?
Is the fan in the back running. You can tell if this is not work because the middle wall will be really hot where the doors touch it. Is there frost in the back of the freezer? Do you hear the fan running in the freezer? You will only here it when the compressor is running, this is true also for the fan in the back.

-----------
these refrigerators have a damper control basically a motor with a vent that opens when its too hot in the fresh food side and closes when its too cold.its very common for the motors to go out or freeze up at short out then the fresh food side will freeze up because the vent is wide open no matter what setting.
Refrigerator air inlet cover/damper kit with fan motor. Damper and fan assembly has been updated to prevent freezing in the refrigerator.
You can get required parts from www.repairclinic.com

Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.



Posted on Aug 30, 2010

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  • Refrigerators Master
  • 3,083 Answers

I'm not an appliance tech, per se, but I'm guessing that the thermostat might be bad...does the compressor come on when you turn it down? Might try to listen to what happens.
Here is an excellent site that has blowup diagrams of your unit:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5131396&diagram_id=21754926#d21754926
This quote from repairclinic.com confirms my suspicion about the thermostat:
If the temperature is too low and you can't make it warmer by adjusting the thermostat, you probably have a defective thermostat. If so, you need to replace it, because they cannot be repaired. Other possible problems are a leak in the sealed (refrigerant) system, cold air migration (in side-by-side models) or a defective air damper. These problems can be quite difficult to locate and correct, we recommend you contact a qualified appliance repair technician. This is the site: http://www.repairclinic.com/Refrigerator-Troubleshooting This site will explain about the air flow, dampers, and how cooling takes place and is controlled: http://www.appliance-repair-it.com/How-refrigerators-work.html In your case, I would think the damper and fan are on longer than they should be, and that may be controlled by the thermostat. Good luck, hope this helps, and thanks for using FixYa.

Posted on Aug 30, 2010

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  • Master
  • 944 Answers

Hi,

Hi the flow of the cold air is from fridge to the freezer.If the freezer is defrosted then it will not allow the
pass of cold air to the refrigerator.vents at the back of the freezer that allow the cold air into the refrigerator should not be
blocked pour hot water into the hole so any blockages by the frost will melt and allow the flow of air.

This problem could occur due to various reason.First you have to resolve for the cause of the issue.
First Check the back wall or floor of the freezer section for frost.The Freezer(evaporator) fan is running?.This fan problem is very hard to detect.
The DC motor for the fan wears out the RPM's are effected.It gives the illusion that it is running fine,but it don't have enough force to supply air circulation for both the freezer
and the refrigerator See weather the condenser coil for
blockage from dust and the condenser fan is running.

The defrost system could also be one of the reason:
1)Defrost timer
2)Defrost heater
3)defrost thermostat

1)Defrost timer
Usually the defrost timer could solve this issue.It may be located below or back of the refrigerator.Some times it may be located in the side to for side refrigerator.
Locate the timer and rotate the clutch head screw clockwise until you hear one audible click. That puts the system into defrost mode. If the system restarts after 30-35 minutes.
Then there is no problem with Defrost timer.
GE Profile Top-Freezer PTS22LBNARCC
Unit was - 53074ba.jpg
2)Heater and defrost thermostat is located behind the back wall of the freezer section.
This only controls the Heat.After the Defrost timer stops it makes the system warm.
Defrost thermostat could be defective.

Defrost thermostat :
4452f87.jpgGE Profile Top-Freezer PTS22LBNARCC Unit was - 9d3e168.jpegDefrost heater:
9d3e168.jpeg
If you have frost in the freezer:
You could defrost the freezer by disconnecting the power to the refrigerator and letting it sit for at least 24 hours with both Doors
wide open to allow the frost to melt completely but it will build up again in 1-2 weeks and start the warming up again.


3)Temperature control
Understand the flowGE Profile Top-Freezer PTS22LBNARCC Unit was - 40237ba.jpgr is from freezer this is controlled by Temperature control unit.
40237ba.jpg

Remove the front knob
There will be a pair of wire type connections attached with Temperature control unit.
Set the ohms setting on your multitester to X1 and attach one probe to each terminal. Turn the temperature control to off or to the warmest setting if there is no off position. The multitester should give you a reading of infinity if the control is on off and a reading of near infinity if there is no off position. Then turn the control to the coldest setting and retest. Now, the multitester should give you a reading of zero. If both of these tests are not passed, the control needs to be replaced.

post a comment for further assistance.

Thank you for using fixya have a nice day:-)

Posted on Aug 30, 2010

  • Natarajan Ramasamy
    Natarajan Ramasamy Aug 30, 2010

    Note:I am adding pictures only for your understanding what could be the cause.The picture does not revel exact colour or shape of the object.It means how the object is supposed to me.Many of my customers doesn't know how Defrost timer looks so i have added in the picture.Thank you.


    In your case since all is being controlled into a board.We cannot easily come to conclusion without
    finding the exact cause.
    Mostly this model no will not have any problem with Main Controller board.Check for any transistors are being burnt.
    Many of my customers had problem with the Temperature Control board only.
    If you have ohm meter you could test with weather board circuit can supply volts.
    Mostly the board fault you cant diagnose easily.You have to take it to the service centre to come to
    a conclusion

    The thermistors you said are prone to be defective.For 2-3 years mostly it will not be defective one.
    So replace the one accordingly.






    Thank you,
    Do vote for me if you feel the solution is correct.

  • Natarajan Ramasamy
    Natarajan Ramasamy Aug 31, 2010

    In my repair history we had problem with Temperature control board and fan only.
    The main board was perfectly good.

    If fan is the problem you will have defrost issue.Fan will mostly will not cause big issues.

    Some of my customers had thermistors issue only for model of GE which is produced during 2002-2005
    all other thermistors model where good.

    I will say i will go with Temperature control board only causing the problem it is prone to be defective one.

    Please do rate the solution if the issue is resolved or post a comment for further assistance.
    Thank you for using fixya have a nice day:-)

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