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GE bottom freezer fridge does not defrost, how do I know if problem is with thermodisc fuse or with the defrost heater

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Hi,

Check out these tips...they can help you figure out what is going wrong withyour refrigerator and why it is not cooling

Refrigeratornot Cooling or Fridge not Cooling

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Refrigeratoror Freezer not Cooling or Getting Cold
heatman101

Posted on Mar 19, 2011

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6ya6ya
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Posted on Jan 02, 2017

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There is ice forming on the evaporator coils of my GE Monogram refrigerator. This is the "all-refrigerator" model (ZIRS36NMDLH). There appear to be two 'thermodisc'. One thermodisc is...


Hi.

When the back of the freezer is icing up you need to test the defrost system, which is responsible for the problem . The evaporator coils freeze up because the defrost system is not working. this results in compressor and fan running most of the time and in reduced or no cooling, particularly in the fresh food section. The freezer may still be cooling.

Defrost system problems are quite a common issue with refrigerators. Coils freeze because of a defective defrost system. With coils frozen the condenser will go under stress and will loose efficiency. The result is the system not producing enough cold to refrigerate the fresh food section while the freezer section instead keeps working.

Try disconnecting power overnight. Allow the freezer to defrost with power off. If the fridge works after that you have a defective defrost system. In that case the problem may come back after a couple of days. To fix the problem the parts comprised in defrost system must be tested, so to find and replace the defective part.

The defrost system comprises defrost thermostat, heater, defrost control and fan. The parts that fail more commonly are thermostat and heater. Both parts are located behind freezer firewall and tested reading impedance with a multimeter. Element and thermostat are faulty if they return Ohms infinity (the circuit is open) when reading impedance with a multimeter at the part's contact.

If thermostat and element are OK, the next part to be tested is the fan. Fan can be tested by simply checking that the motor is running when energized.

Here a tip explaining how to deal with a similar problem on a different fridge model: Fridge not cooling. Procedure is similar with your model.

Here all parts and diagrams for your model.

You can also find parts and diagrams for most appliances using the links listed on this page:
Where do I find parts and diagrams for my appliance?

Regards.


Ginko

Aug 22, 2011 | GE Refrigerators

1 Answer

Freezer back wall covered with :snow' Model tfx20sa


The heater element or defrost thermostat has probably gone bad. Remove the service panel and look for ice8faffd3.jpgSee the heater? Looks like it is bad. Attached to it is a defrost thermodisc. When the defrost thermostat (terminator) 7953294.jpg gets to 50f it shuts off power to the heater. So check those. If both turn out to be ok then you probably have a bad adc board. Manuals are HERE

Aug 08, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

GE side by side unit. Freezer OK, fridge


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.

Hope this work.....


Jul 28, 2010 | GE Profile 26.6 cu. ft. Side-by-Side...

1 Answer

PFS22SISSS Freezer temp. is high and maintaining at 14-16 degrees. What could be causing it?


Defrost heater, defrost thermostat or the mother control board. In that order. We need to look inside the rear of freezer to see if frost is beginning to buildup on the rear wall. If yes the defrost is not working properly. Need to unplug and remove the rear panel in back of freezer to have a look at the defrost heater and check it with an OHM meter. Part number for the heater is WR50X10042. I just noticed yours has a thermodisc fuse we need to check part number WR50X10047 I will be here if you would like my help, Thanks, Sea Breeze

Aug 18, 2009 | GE Energy Star PDS22SIS Stainless Steel...

1 Answer

Fridge and freezer running too warm


You will need to unplug the refrigerator and remove the back panel inside the freezer. Check for ice or a frozen over evaporator coil. If frozen defrost and we will need to examine the defrost heater at the bottom of the evaporator. It may have a glass tube covering the heater element inside. I want you to check to see if it is burned out. The part number for the defrost heater is WR51X10042
You please let me know what you find. If the element is burned out I recommend you replace it and the defrost thermostat part number WR50X10068
You and order the parts by clicking the link below and entering the part number into the part number search feature and click FIND IT. Let me know what you find, Sea Breeze
PART NUMBER AND MODEL SEARCH FEATURE
Here is a photo of the defrost heater.

WR51X10055 Defrost Heater

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WR55X10656 Mother Control Board

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It is possible that there problems with you mother control board. Need to unplug and examine both sides for burn marks.

5731be3.jpg
If you need help feel free to let me know, Thanks Sea Breeze
appliancepartsse@yahoo.com

Jul 30, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

HOTPOINT FRIDGE - COILS FROSTING UP


as you know your unit is not going through defrost cycle. you need to replace either the control board, defrost heater and or defrost thermostat. ge is known for their defrost heaters going out.

Jun 24, 2009 | Hotpoint FFA90 Bottom Freezer Refrigerator

1 Answer

Fridge not cold freezer is fine


Your defrost element is faulty, this is attached to the bottom of the freezer coils and also has a defrost limiting thermodisc which should be replaced at the same time. You are getting a freeze up and therefore no air circulation. Also check that the fanmotor is ok.

Mar 04, 2009 | Kenmore 55612 / 55614 / 5561 / 655619 Side...

1 Answer

Fridge not cold, freezer on bottom works fine


you have defrost problem 1 timer defrostthermostart or heater

Jan 19, 2009 | GE GDS18LBR Bottom Freezer Refrigerator

2 Answers

Freezer side cold, frige side warm


Defrost heater is open behind back wall. order new heater #wr55x10101 remove 4 screws 2 bottom, 2 top behind light shield, defrost freezer so ice is off of evap, replace heater with new one.

Nov 13, 2008 | GE (PSS26MSRSS) Side by Side Refrigerator

3 Answers

Coils in freezer ice up and fridge gets warm


it could be 3 things...deftrost heater, bi -metal thermodisc, or defrost controller.

Jun 27, 2008 | Kenmore 73502 / 73504 / 73509 Bottom...

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