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The freezer coils ice up Timer is working also the thermostats. The coils look like a block of ice

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Defrost heater is bad.

Posted on Jul 03, 2010

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Ice and frost on coils inside freezer


Possible that the auto defrost timer is faulty and is not working to the scheduled timing causing the frost to build up and block the coils in the freezer.
You will need to check this timer at the rear bottom of the fridge , check if thee timer clicks on or else replace,
Make sure that the thermostat is also working and shut the compressor when the thermostat is set low.

Sep 27, 2010 | Microwave Ovens

1 Answer

Bottom frezzer is working but fridge is not blowing cold air


Refrigerator gets cold air from freezer compartment. Either the air flow is blocked by food items or ice, or the recirculating fan is not working.

The most common failure is that the freezer coils get all iced up becuase the defroster timer, defroster thermostat, or heater has stopped working.

When it's running, you should feel cold air blowing out of the vents that are in the fridge, otherwise, the 'air tower' (air vent) is blocked with ice.

If you manually defrost the whole thing, and it runs fine for a day or so, then it's not defrosting properly. If you manually turn the defroster timer, and you don't hear the scorching/hissing/gurgling of the defroster working, then that would confirm a fault in the defroster circuits.

Based on the following thread, it's probably a bad defrost thermostat.

http://www.applianceblog.com/mainforums/sears-kenmore/13766-kenmore-elite-22-bottom-freezer-refrigerator-fridge-not-cooling.html

Nov 02, 2009 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

1 Answer

EVERYTHING WORKS FOR ABOUT A MONTH AND THEN THE FREEZER HAS A BLOCK OF ICE ANT THE BACK AND THE BOTTOM BECOMES WARM


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 In most newer models the timer has been replaced by an electronic control board.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.


Aug 27, 2009 | Frigidaire FRT21H8 Top Freezer...

1 Answer

My freezer works but my refrigerator does not. What the problem?


This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 24, 2009 | Dometic Refrigerators

1 Answer

Freezer compartment has frost buildup


This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 24, 2009 | Whirlpool GS5SHAXN Side by Side...

1 Answer

Warm


If you need freon you can't do it yourself

Could be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 23, 2009 | GE Refrigerators

1 Answer

Refrigerator isn't very cold- drinks are just slightly chilled


Usually caused by failure of defrost system, Air ports from freezer to fridge blocked by ice

This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 23, 2009 | Whirlpool Refrigerators

1 Answer

Gets to 35-40 degrees then doesn`t maintain till is shut down and started over again.


This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 21, 2009 | Refrigerators

1 Answer

I had a huge block of ice on the bottom of my freezer that I got rid of yesterday. Over night the ice started to form again. What could be wrong? The unit is only about 8 years old and we've already had...


This can be caused by the drain hole below freezer coil being blocked by ice. You MUST remove all ice in drain under freezer coil. Use turkey baster to squirt hot water into hole and use hairdryer to defrost. Possible defrost thermostat is defective. Unit never goes into defrost, ice forms on coil and in floor of freezer. After defrosting may work OK for a week or two but gradually gets warmer because ice is blocking ports where cool air gets to refrig. May also have water in refrig box. Can also be caused by defective defrost timer.

Aug 19, 2009 | Refrigerators

1 Answer

Ice in defrost coils


The defrost systems is:
HEATER-DEFROST
THERMOSTAT-DEFROST
TIMER-DEFROST
Start with the timer. It is just under the front kick plate. there is a knob you can turn it slowly.until it clicks off the compressor. then open the freezer and listen . You should hear the heater come on .. it will sizzle when it comes on ...
You will have to remove the back panel of the freezer to check the heater for and thermostat for continuity. Heater are the lease likely part to go bad... I always change thermostat and timers together.
let me know if this helps or we can chat if you need more help.

Jul 27, 2008 | Maytag 22.6 cu. ft. Side-By-Side...

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