Question about GE Refrigerators

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Refrigerator and freezer not cooling enough ever since we had a city wide power outage. We turned the temp controls to 9. I am an electrician experienced in troubleshooting. What should I look for before replacing the $150 mother board?

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  • pcjackson50 Mar 22, 2011

    No clicking sound or frost on back wall of freezer

  • pcjackson50 Mar 22, 2011

    GE frig model #GSH22KGMDWW the frig is at a rental house - I'm not on site and I haven't been able to pull the frig out yet because we have to take some trim off to get it out. I was hoping for a list of things to look for when I do get there to work on it

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Cut everything off for a few minutes then turn it back on and listen for a click from the compressor relay as the compressor tries to start.
Is the compressor motor running.If no check starter/overload relay. The relay is a small usually black cube shaped electrical part plugged into the compressor or wired to it nearby. It may appear burnt or rattle when shaken if it's bad. The two connections should show continuity with an amp meter. If it's good then it's most likely the compressor causing the problem.
Check to see if the condenser fan at the back underneath near the compressor is running. If no check fan.

Are the condenser coils near there warm or room temp. should be warm





Is the evaporator fan in the freezer running. It blows cold air into the fridge side through a damper in the wall between the freezer and fridge. Make sure the damper is open.

Below the evaporator fan is the evaporator coils. Remove the back cover in the freezer to observe the frost pattern. Light frost everywhere(NORMAL) or a partial pattern of ice(LOW ON FREON) or nothing(LOW FREON OR COMPRESSOR PROBLEM).
If it's iced up really heavy you have an auto defrost problem. Melt the ice with a hairdryer and check the defrost system.


There are two possible causes or types of frosting. One is where the surface of the items in the freezer have frost on them. It may be in one spot or evenly distributed. This is caused by excess room air getting into the freezer because of leaky door gasket which should seal snugly on a dollar bill inserted between the gasket. Frequent or prolonged door opening will also allow room air in. The higher moisture content in the air freezes on the surfaces of the food etc.

The other cause and type of frosting is automatic defrost failure.


DEFROST PROBLEM
The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.

If this ice is not melted it will continue to build up until the air can't flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.

If the defrost thermostat is bad, it can prevent the heater from coming on OR it won't turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass(disconnect the two wires plugged into it and twist them together) the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.

The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it's bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it's in the defrost mode.


you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others.

Posted on Mar 22, 2011

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Do you hear any clicking at the back or is there frost in the freezer at the back wall??

Posted on Mar 22, 2011

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