Tip & How-To about Refrigerators

GE ice box control board revamp

These new fangled GE ice boxes have auto defrost boards in them. The boards control the compressor, the fans, and the damper as well as the defrost functions. The program in the computer board uses a method to determine defrost such as how many times the door was opened and how long the compressor has been going (hours) and how long it took for the last defrost cycle. this is to insure even defrosting no matter what climate you live in. The board relies on inputs from sensors located in the freezer compartment and the fresh food compartment. It also relies on a sensor for defrost action a larger bulb mounted on the coil. If the bulb gets out of place it could compromise defrost operations. The board itself is easy to remove and cannot be screwed up wiring wise because all of the quick connects are different. The board itself is mounted on 4 plastic standoffs. On one of these boards I removed I noticed a burntspot on the back side of the board. It was the compressor relay that activates the compressor from the board. My opinion is today's lead-less solder does not hold up as well as older type lead soldier and therefore the heat from the relay melts the soldier. I took a cheap iron and re soldiered the connection the board and re installed it. The ice box has been working great every since for more on diagnosing GE ice boxes with auto defrost controls check out my web page
The page has service manual downloadable for late model GE refrigerators.

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The freezer isn't cool enough and the refrigerator temperature goes up when we put stuffs.


I would first look under the ice box for signs of air restrictions. Clean out the bottom and make sure the fan and compressor is working. Inside the ice box listen to see if the fan is running in there. If that is fine I would look for signs of frost on the back wall of the freezer. If frost is present then ice is on the coils and you have a defrost problem. Their are 2 basic circuits in an ice box. Compressor run AND Defrost run. Compressor run circuit is anywhere from 8 to 12 hours depending on manufacturer. Defrost is 21 minutes. On new fangled electronic ice boxs the brain decides when defrost is needed using inputs from sensors, compressor run time, and how many times the ice box is opened and closed. But the new fangled ice boxs still have a defrost heater and thermostat like any ice box with automatic defrost has. Why do we need a thermostat? The heater is very powerful. It could easily destroy the ice box. It takes only moments to elevate the crawlspace inside the evaporation compartment to 50 degrees F. This keeps any frost that could turn into air flow blocking ice at bay.
Remember the defrost time is 21 minutes. If that heater was left on for 21 minutes it would not be purty. The termination thermostat is recommended to be replaced if it goes bad or whenever the heater is replaced. I say replace all 3 things in the circuit and be done with it. But who these days can afford that? If you suspect a defrost problem just unplug the ice box for a day or 2. If the ice box goes back to performing ok then you can suspect you indeed have a defrost problem.

May 21, 2011 | Refrigerators

1 Answer

refrigerator motor is still running but it isn't as cold as it should be. Is there something that I need to change?


Check to see if the condenser fan at the back underneath near the compressor is running. If no check fan.

How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php
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 the evaporator coils behind the back panel of the freezer are icing up heavy because of auto defrost failure that will stop the circulation of cold air
check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

Jul 12, 2009 | Refrigerators

1 Answer

er dh code error on Kenmore elite trio


The Er DH error code indicates the temperature sensor on the evaporator coil did not reach 50 degrees within one hour.
This would indicate the control board did put the refrigerator through a defrost cycle.

This problem could be caused by a defective relay on the control board, a defective defrost heater, a broken wire to the heater, or a stopped up drain on the defrost pan causing ice to form on the evaporator coil.

Before replacing the control board, someone should remove the food from the freezer, remove the freezer drawer, and remove the evaporator cover to expose the evaporator coil, heater, and defrost sensor.
The voltage to the defrost heater should be 120 volts ac.
The defrost heater is part of the evaporator coil and is not replaceable as a separate part.

You can test the operation of the defrost system by pressing "Ultra Ice" and "colder freezer temp" for 3 seconds.
The first time you press and hold the buttons the board will test the compressor, fan, and open the damper.

All displays should be on.


The second time you press and hold the buttons the board will test the compressor, fan, and close the damper.

The third time you press and hold the buttons, the board will turn the compressor and fan off and turn the defrost heater on for around 25 minutes. This would let you know if the defrost system is working.


http://knol.google.com/k/fixing-the-er-dh-code-on-kenmore-elite-trio#

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Jul 11, 2009 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

1 Answer

we got home from work yesterday and the refrigerator was HOT inside.


How to check stuff
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php


The fridge gets its cold air from the freezer through a vent(damper) between the freezer and fridge.The fan in the freezer blows air through it. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp ..
If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

Jul 10, 2009 | GE Profile PCF25PGW Side by Side...

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