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Side by side Kenmore refrigerator /freezer is not defrosting. Heater has continuity, thermo disc is closed,defrost timer is electronic. Question can defrost timer be put into defrost ( like old fashioned mech. timer) and how does one troubleshoot this electrical timer Mod#253.57388602..... side question how can a company as large as sears not have any technical people to talk to

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I cant post no links on here but i can help you with the technical questions and send parts. my website can easily be found on google for like whirlpool dryer heating element 4391960 im a few spots on top.

Mark
Whirlpool Parts Surplus

Posted on Jun 30, 2009

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Freezer coils are iced up so the unit does not cool


Garth, The defrost Thermo should be closed when installed otherwise when the timer goes into defrost mode (I am not familiar w/ your model, could be 8,12 hr) the heater coil will not heat up.When closed it will allow the heater to defrost the freezer allowing the air to circulate & cool the fridg section also. The thermostat kicks in to turn off the heater, when it feels there is no more ice to defrost. the actual temp of the thermo can vary.
In the field we trained techs to replace the thermo and timer as a rule if all other components checked & visually looked good. If the heater was discolored or bulged we would advise replacement of it also.Remember the timer is the power source, the heater the engine & the thermo the safety. good luck, sl

Aug 24, 2012 | Refrigerators

1 Answer

Freezer is forming frost around the light fixture located in the ceiling of the freezer compartment. We must manually remove the frost approximately two times per week.


If you are certain that the evaporator fan is running then your automatic defrost function has stopped working.
There are 3 things that cause it to stop working:
1. The defrost control
Item 801 this link:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5206998&diagram_id=26604625#d26604625
2 The defrost heater
Item 826 above link
3. The thermo disc Item 621 above link.
4. The bi-metal thermostat (closed below 60 deg F)
Item 4 can be tested for continuity at temps below 60 deg F.
Item 2 and 3 can be tested at room temp for continuity.

Item 1 the main board controls the defrost cycle which turns the defrost heater on and off.

Primary suspects would be the defrost heater and thermo disc.
Shop areound for the heater if you find that is bad... the link I posted that heater seems VERY expensive to me. The heater PN: WR50X10042 I note prices in the range of $115.00 - $171.00

This PN defrost heater has a history of repeated failure.

Thanks for choosing FixYa,
Kelly

Sep 08, 2011 | GE Profile PFS22SBSS Bottom Freezer French...

1 Answer

Frigidaire PLHS269ZDB9 is not getting cold enough to freeze or make ice. I took off the panel , there is an ice block on the thermostat to the evaporator. trying to defrost.


When the refrigerator is running ( cooling mode ) the defrost timer contacts prevents any power from getting to the defrost heater. When the defrost timer turns off the power to the compressor and fan motor(s) the power is then redirected to the defrost system. The defrost timer motor


Defrost thermostat:
During a defrost cycle, the defrost heater causes the metal alloy in the switch to warm and as it does it curls back and breaks the circuit. As the metal cools, it makes a closed circuit again. A defective thermostat can prevent the defrost heater from coming on or allow it to overheat which could result in heat damage or fire.
The defrost thermostat is located near the defrost heater and is wired in series. It is usually located at the back of a side by side freezer, behind the freezer back wall of a top freezer or under the floor. It will be necessary to remove obstructions such as the contents of the freezer, freezer shelves, icemaker and the inside rear or bottom panel of the freezer. At room temperature the defrost thermostat is an open circuit ( no continuity ) and when cooled down the defrost thermostat closes the circuit ( has full continuity ) to allow the defrost heater to come on.



Defrost timers:
The defrost timer is sometimes found behind the front grill of the refrigerator. It may also be found behind a cover plate inside the refrigerator or freezer, in the temperature control console, or behind the refrigerator near the compressor.
The timer is usually held in place with one or more screws. Remove the screws and gently pull the timer out far enough to disconnect the wiring connector.

Locate the timer switch and turn it clockwise until you hear it click. One click and the refrigerator shuts off = defrost mode, second click the compressor and fans come back on = run/cooling mode.

*Some defrost timers are a constant or continuous run timer, which means when ever the refrigerator is plugged in the defrost timer is powered up and running. Some defrost timers are an accumulative run timer, which means when the refrigerator is off the defrost timer is off and not running, when the refrigerator is running the defrost timer is running. This is also sometimes called a demand defrost. The power for the defrost timer goes through the cold control first on an accumulative defrost system. The timers are often the same but will be wired differently to get the different operations.



Defrost heater:

Test the heating element for continuity using a multimeter. Set the multimeter to the ohms setting X1. Place a probe on each terminal. The multimeter should display a reading somewhere between zero and infinity. Because of the number of different elements we cannot tell what your reading should be, but we can be certain of what it shouldn't be. If the reading is zero or infinity the heating element is definitely bad and should be replaced. Proper power ( careful!! ) to the heating element ( 110-120 volts AC ) and the defrost heater does not come on = bad defrost heater.


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Some newer refrigerators have been using an electronic board instead of an mechanical defrost timer. The adaptive defrost control does the same job as the defrost timer ( shuts off the refrigerator cooling items and redirects the power to the defrost heater for the defrosting cycle, then redirects the power to the compressor and fans to come back on when the defrost cycle is over ). This adaptive defrost system is a bit different when testing, normally speaking if the defrost heater and defrost thermostat ohm ok, we replace the adaptive defrost board.


Nov 28, 2010 | Frigidaire Refrigerators

1 Answer

Kenmore refrigerator stop cooling but fan working


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. Make sure this fan is running. You may have to hold the door switch in for it to run. There is a flap you adjust with the fridge temp. control. Make sure it's opening and closing when you adjust the fridge temp.
The problem could be the electronic control if you have one or the mechanical linkages.

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.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.


Your evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.

Apr 06, 2010 | Kenmore 53642 / 53644 Side by Side...

1 Answer

The refrigerator part stop getting cold, but freezer part is still working, what do i need to do


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.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

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

Aug 30, 2009 | Kenmore 57029 Side by Side Refrigerator

1 Answer

We have side by side kitchenaid refrigerator. The problem is the freezer side is working, but the vents in the other side (refrigerator) does not blow air. I think the diffuser is not working. Is that...


most likely defrost problem, check for evidence of frost on back of freezer panel, remove evap cover if nec. Make sure evap fan is working, if not, test for power to evap fan, if none, replace. if defrost problem, ohm out heater and defrost thermo, if either open, replace, if not, check defrost timer. If in defrost no power to heater or thermo, replace timer.

Jun 25, 2009 | Refrigerators

1 Answer

25357672791 Kenmore S/S will not auto defrost


the TIMER, isthe defrost timer and looks( form the diagram ) to be locaeted behind the toe grille(kickplate), on hte left side. as far as the heater, its located behind the freezer panel and last part in the equation isthe defrost thermostat , which youll find clipped to the top of the alluminum evaporator( alos behind t he rear freezer panel and one of the leadds fron the thermo will lead to the heeater

Mar 09, 2009 | Kenmore 55612 / 55614 / 5561 / 655619 Side...

1 Answer

I have a Frigidaire Refrigerator (side by side) - and both sides are not working. We noticed the Defroster-Heater was cracked and when we connected the cracked area the fan would turn on. We just replaced...


Check the defrost timer, it may be stuck in the defrost mode. In defrost mode the heater will not come on unless the thermo disc is cold. This disc is attached to the coils close to where they come into the freezer.

Dec 04, 2008 | Frigidaire FRS26R4A Side by Side...

1 Answer

GE Profile SxS Refrigerator wont defrost after new heater installed


If one coil was burnt out and you replaced the heaters and defrost terminator switch I would recheck the continuity through the defrost heaters. You can do this with an Ohm meter with the refrigerator unplugged. If you had an open coil in one of the heaters you did not have to replace the thermo disk. If you have a complete circuit through the heaters try using the old thermo disk. If you have a meter you can check the voltage from the heater connection on one side to the inlet side of the thermo disk with the refrigerator running in the defrost mode. You should read 115-125 Volts on the meter. This reading tells you that the defrost timer is supplying power to the heater circuit.

Apr 30, 2008 | Hotpoint HSS25IFMCC / HSS25IFMWW Side by...

1 Answer

Refrigerator warm


this particular model has onlya defrost thermo and heater. the defrost timer is actually built into the electronic control.behind the kickplate there should be a tech sheet to aid in r\troubleshooting the unit.all are a little different but youll be able to go into the electronic control andtest the parts indivually. all you reallly need to do is "force a defrost" cycle.
if need be a continuity test can be preformed on the defrost thermostat( clipped onto the the top of the evaqporator coil) as well as the defrost heater which is also located in hte evap section ( its wrapped around the coil(u-shaped element) heater should also have continuity.
defrost thermo IS the MOST common issue with any defrost problem. heres a link to sears.com gives a location as well as part numbers if needed 35is thermo and 33 is the heater

Mar 28, 2008 | Kenmore 54602 / 54604 / 54609 Side by Side...

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