Tip & How-To about Refrigerators

GE refrigerator non defrost issue with Mother Board

This procedure will define the issue with a non defrost issue in all GE refrigerators controlled by a Mother Board.

Description of Non Defrost.

Are you noticing a drop in temperature in the refrigerator and or a frosting of the lower rear back panel of the freezer. This would indicate a non defrost issue. There are four reasons for this to ocurr.The four reasons will be adressed in the instrutional video I have posted below.

The tech has set up in the back ground a G.E. freezer section to demonstrate an actual scenairo.

Click on the link http://www.youtube.com/watch?v=BrSQz-5F1hs

You will need the print to the Mother Board.....The Mother board controls all aspects of the unit. Because you have a defrost issue do not think that it is because of the mother board. Most of the time it is just the defrost heater that is bad. If the defrost heater is bad remember to always change out the defrost thermostat also. Note the print....you can check all aspects of the unit from here....

click on the link http://fixitnow.com/wp/2006/06/29/ge-arctica-refrigerator-troubleshooting-tech-sheet/

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Keith

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1 Answer

Need location of defrost timer


The refrigerator you listed does not have a defrost timer. All defrost and refrigerator functions are controlled on rear of the refrigerator. It's called a mother board. If it s damaged you will sometimes see burns on one of the both sides, but not always. Another problem could be that your defrost element or defrost thermostat is defective. You can see your refrigerator below by putting the model GSS201EMBWW into the model search feature. I am here to help you if you want, Thanks Sea Breeze

http://servicepartstec.blogspot.com/

Here is another link here on FixYa that shows the mother board

http://www.fixya.com/support/t230703-ge_refrigerator_stopped_working

May 28, 2009 | GE GSS25SGMBS Side by Side Refrigerator

2 Answers

ice forming on rear of freezer wall


The best way to determine what has caused a non defrosting GE electronic control model is to first access the control board. Jump terminals line power to defrost, (J4 and J9). An amp probe should be placed on this jumper wire to determine current draw of the defrost circuit. A three amp draw is what is normal for this circuit. This will eliminate checking behind the evaporator cover to determine a defective heater or over temp device (defrost terminator). Note: This test is only to check the defrost circuit. It does not initiate a defrost cycle. If the unit is in any other cycle than defrost, that cycle will continue to operate as well.

May 07, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

2 Answers

Defrost Heater or Main Control Board, Which one is at fault?


Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} To answer your question I know of no reason the electronic type of board would cause the heater to go out unless the defrost thermostat (or sensor) and board stuck in the defrost possession and did not stop the heater. Any time you replace the board and have had a defrost problem a check of the heater will either confirm or eliminate it but the defrost sensor should be replaced if the board is being blamed for non defrost. I cant rule out 100% that a bad board will not cause a heater problem but the high 99% range is most likely. If you have a volt ohm meter and can find the heater circuit on your board and the freezer has been running down to correct temp you can check the defrost circuit by ohming it out. Lower resistance of 10 to 60 ohms is common. Anything higher will require ohming the heater out directly and the defrost thermostat will be open if the temperature is above the stats range.

Common to all self defrosting refrigerators / freezers is the need to move air around to pickup heat inside the compartment. Common to all frost free refrigeration to maintain this feature are 3 items:
1 and initiator (defrost timer or circuit board),
2 A heat source for defrost (Usually an electric heat element but can be other types of heat sources)
3 A safety limit to stop the heat source, leaving it warm enough to defrost and keep the heat contained where it will not affect the compartment advisedly. In a standard type defrost (non - electronic) it is called a thermostat. In an electronic board defrost it is called a sensor.

The defrost timer / or board will never be in the Freezer. Other than that it could be in the refrigerator section behind a plastic cover or metal cover on the back outside. It could also be under Neath the front corners or center of the front kick plate.

A timer you can turn the cam clock wise till it clicks. A board will depend on the manufacturer as to how to send into defrost for a test. A sensor on the defrost type board may be required to by-pass into defrost or test mode.

The freezer section has the only cooling coil. It sounds like it is blocked with frost and thus won’t let the air circulate from freezer to refrigerator.

There is a defrost timer, (or board), a defrost heater, and a defrost safety thermostat. Any One of these or a combination of 2 can be your problem. If you have a energy efficient model that has electronic controls then you will have a board. The procedures for checking the circuit on a board vary by manufacturer of the board used and manufacturer of the appliance.

The defrost heater always has resistance and is attached to the freezer coil.
The defrost thermostat is also attached to the heater electrically, unless it is an electronic sensor type. Sensor types have a range of resistance that needs to be known to check and varies slightly with the temperature of the sensor.

If I haven't lost you here you maybe equipped with the life experiences that will allow you to do most of these checks. If its over your understanding I recommend you contact a reliable technician..

Apr 17, 2009 | GE GSS23SGSSS Stainless Steel Side by Side...

1 Answer

Defroster cycle stuck


Unfortunately GE has been having a problem with the main mother boards on your model refer, the mother board controls the defrost cycle and there is not reset for it, you may have a bad board.

Mar 17, 2009 | GE GSS20IEM Side by Side Refrigerator

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