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Defrosted, now not working at all

Thermostat was already bad, getting too cold. Have been running on a timer for shut off. Accumulated some ice up top, so manually defrosted. Now won't kick on at all.

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  • Refrigerators Master
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The defrost timer is bad.

Posted on Apr 17, 2014

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1 Answer

Not cooling and making ice


Ice is made when freezer temperature is cold. Freezer and refrigirator will not cool if iced up on back wall. Your defrost system failed, causing frost buildup on the coils and restricting airflow and heat transfer. Most likely cause is a defective defrost timer that is not advancing into defrost (2-3 times every 24 hours). Defrost system comprise Timer, Heater, and Thermostat. You need the tools to diagnose the cause or just try one by one to replace the parts. Other choice is to call a tech. The freezer must be defrosted one time manually to remove the long accumulated frost.

Oct 20, 2015 | Refrigerators

1 Answer

Frezzer not cold enough


Cold originates inside the freezer. TA fan pushes the freezer air into the fresh side. So... if that fan ain't working or ice is built up inside the freezer then the freezer will work but the fresh side will suffer. If you have a defrost problem you could find out real easy. Just unplug it and wait a while (depending on how bad it is iced over you might need to go a few days). Plug her back in and if it works ok for a few weeks but does the same thang again then you have a defrost problem. The defrost system has 3 components defrost timer/control defrost heater and defrost termination thermostat. Why do we need a defrost termination thermostat you say? The defrost length is 21 minutes. if that heating element were to stay on 21 minutes your goose would be cooked instead of defrosted. The termination thermostat is designed to shut down the heater when the temp inside the evaporation compartment reaches 50f. So what goes wrong? Timer hangs up electronic control takes a dump, heater goes bad, Termination thermostat goes bad. Number one component that goes out? Termination thermostat. Look for swelling.
12_21_2012_8_47_41_pm.jpg

Dec 21, 2012 | Dryers

1 Answer

Condenser not defrosting. I have a F44R21NGW1. The condenser coils won't defrost. The appliance repair service has already replaced the defrost timer and declared everything else working. It worked fine...


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 a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. 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 because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.
Part 23 on this diagram is your defrost timer.
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=108655&diagram_id=252596#d252596

Jun 13, 2010 | Refrigerators

1 Answer

Our kenmore side by side refridgerater's ice maker is no longer making ice. The water in the door is still working and the filter is not old. No unusual noises If it needs to be defrosted is there a way to...


If it needs to be defrosted that's probably why it's not making ice.If you want to defrost it before you get it fixed you can use a hairdryer on the coils behind the back cover inside the freezer.
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 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.

If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. 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 because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

If 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.

If you need help finding your model number see here> http://www.appliancepartspros.com/modelnumber_locator.aspx

To locate your timer, motherboard, control or adaptive defrost control , enter your model number and search for the part or post back on Fixya.
http://www.searspartsdirect.com/partsdirect/index.action?psid=26129238&sid=PSx20071217x00001a

Sep 27, 2009 | GALAXY Microsystems 25.4 cu. ft....

1 Answer

Oklahoma Freezer cold fridge warm fan gets Ice build up !


You should not have to manually defrost. Your auto defrost system is not working. Check the timer usuall in the frig compartment near the thermostat ( a small hole, use a screwdrive flat tip 1/4" to rotate the timer till it clicks starting the defrost cycle) check freezer in 10-15 min should be defrosted if not you will need to check the heater and thermostat located behind the rear or bottom panel of the freezer.

The defrost timer could be under the box in the front behind kick panel or in the rear by the compressor.

Sep 22, 2009 | Haier HTE18WAA Top Freezer Refrigerator

1 Answer

Ice getting accumulated even it is frost free


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


Sep 07, 2009 | Bosch Classixx KGV28323 Bottom Freezer...

1 Answer

I have jenn-air jcd2389ges - the freeze keeps running and coils ice up. It is cold and does make ice. I shut it defrosted -put it back on and it just keeps running and frosts up again


It could be a bad defrost timer or a bad thermostat. Both are a cheap fix also, check to see if the condenser coil is clean. If it isn't clean it!
Another possibility if it isn't the T stat or defrost timer, the defrost heaters or overload might be bad.

Jul 05, 2009 | Jenn-Air JCD2389G Side by Side...

1 Answer

The coils behind the stainless back panel are caked with ice. I have defrosted them...now what.Fridge won't stay cold and ice keeps building up.Unit is 17 yrs. old. traulsen freezer/glass door fridge ERS...


may be you have problem with the Evaporator fan motor not running, defrost heater, defrost timer, open gap on door gasket and bad thermostat (cold control), it may kept the compressor constantly running. Good luck.

Jun 27, 2009 | Traulsen Refrigerators

2 Answers

Freezer frosts up and then the refer doesn't get cold air. I have completely defrosted it twice. Model # ED25DSXDN03


You have either a bad defrost heater,defrost thermostat or defrost timer.
The defrost timer is located in the control panel box in the fresh food section. The heater and thermostat are in the freezer section behind the rear panel.
On this brand it is usually the defrost timer.

Jun 26, 2009 | Whirlpool Refrigerators

2 Answers

Fridge doesn't get cold enough


you have either a Defrost heater / a defrost timer/ or a defrost bi-metal that is bad. if you post your model # i can look it up and show you how to set it into defrost to see if the heaters are ok
Since you replaced the timer already that leaves two things you need to check set it into defrost if you know how and remove the panel in the back wall of the freezer you should see the heater(s) are on if not check pwr 120vac at the heaters if 0 volts the bi-metal is bad

Feb 22, 2008 | GE GSS25LGM Side by Side Refrigerator

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