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Icey coils,replaced bunrt defrost heater coils still ice up

I noticed ice on back panel removed it coils all frosted up replaced burnt defrost heater turned back on and the coils still ice up and the defrost is not defrosting

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Replace defrost timer and defrost thermostat.

Posted on May 13, 2009

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Is there a simple fix for my fridge/freezer to get rid of frost and start making ice again?


Remove the rear panel on the inside rear wall of the freezer. Unplug your machine. This will give you access to the evaporator coil in the unit. Use a hair dryer to defrost any ice or frost build up that you may see on the panel or on the evaporator coil. This frost up issue is known as a defrost issue which is due to either the defrost thermostat, the defrost heater, or the defrost timer or adaptive control in some units having a fault condition. Most of the units that I do repair the issue is caused from the defrost thermostat having a fault condition. You can disconnect both the defrost thermostat and the defrost heater and perform an ohms test on both of these parts in order to find which is your problem area. The thermostat usually will read at about .50ohms and the heater will usually be around 25-28 but I have seen some also test good at 21 as well. If you have any further questions message me back.If both parts test good and you need to know how to test the adaptive control or defrost timer. 85% of the time this issue is due to the thermostat. I await your reply.
Thank you,
Rick

Dec 10, 2011 | Kenmore Side by Side Refrigerator

1 Answer

New Frig..just l yr old. Water droplets on floor below bottom pull out freezer compartment. Discovered a layer of ice built up inside below the racks. Can't find anything in the manual to indicate...


Your drain is plugged. When in defrost mode the heater comes on in freezer and melts the frost on coils. Sometimes the frost falls off in a chunk and covers the drain. The heater can only be on for so long until the bi-metal/ defrost thermostat shuts it down. Once the defrost cycle ends the frost turns to ice and builds from there. Your heater is melting the frost and the water has no place to go so it goes under the racks.

To fix remove contents off freezer and remove racks. Remove the back panel 4 screws and you will see your drain plug under the coils. Remove any ice you can see blocking the plug. Now pour hot water into drain until it flows into drip pan under freezer. You can remove back access panel behind fridge at bottom. Once water flows freely though than replace the access panels.

If you leave fridge plugged in while doing this be careful.

Aug 01, 2011 | Maytag Refrigerators

1 Answer

The refrigerator stays at 47 degrees but the bottom compartments freeze


You have a defrost problem. A blockage of frost in the freezer prevents air flow over the cooling coils there, allowing very cold air to migrate back into the bottom of the refrigerator section. Unload the freezer and remove the back wall, melt the frost off the coils with a hair blower, and check to see if the defrost heater at the bottom of the coils is burnt out. If heater is OK, replace the 1.5 inch long white thermistor located at the very top of the cooling coils.

Feb 12, 2011 | GE Profile 25.6 Cu. Ft. Side-by-Side...

1 Answer

RFA52 upright fridge freezer keeps frosting up.what is the 'normal' setting for the freezer 0 or 1?


Setting should be midrange. If the freezer is frosting on the back panel you have a defrost problem. The coils will be iced over and the unit will slow down on it's cooling. If there is frost you will need to deice the coils by removing the frezzer back wall panel and use a hair dryer to melt all of the ice. The problem causer of all this will be either the defrost timer, defrost t-stat or defrost heater. Good luck.

Feb 28, 2010 | Freezers

1 Answer

Our refrig.& freezer stoped working. i cleaned the coils and vacumed undernead. it worked all night and also made ice but it stoped working again this morning. so i pulled the back of and checked the...


Make sure the fan near the compressor is running and that the coils next to it are warm. If that's not the poblem
Then 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 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.

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 04, 2009 | Whirlpool 25.6 cu. ft. Side-by-Side...

1 Answer

Freezer coils frost up within minutes after being turned back on


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.

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 31, 2009 | Bosch Classixx KGV28323 Bottom Freezer...

1 Answer

Freezer has slight frost built up. Fridge is only slightly cold - set on 7. It is 5 years old. What might the problem be?


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 heavily 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 29, 2009 | Refrigerators

1 Answer

I have an 8 year old side by side refrigerator that is not cooling right. We turned the temp to make it colder and its still not cold like it should be. Also, I'm noticing condensation in my drawers and...


Turn your refrigerator off and remove the back wall inside your freezer section. Use a hair dryer to melt off all the frost and ice. The frost was blocking the flow of air over those cooling coils, resulting in very little cooling. The most likely cause of this condition is burnt out defrost heater(s). It can also be caused by a bad defrost thermostat, air leakage like a door left open a long time or bad gaskets, or a bad defrost control.

Aug 16, 2009 | Refrigerators

1 Answer

Refrigerator not cooling


unplug appliance, melt ice on back of freezer, remove panel rear of freezer, find leads to defrost heater and test with a multimeter, if you have condinuity replace defrost termostat, if no condinuity replace defrost heater. after removing panel you will have to melt ice in rear with heat gun before testing.

Jun 22, 2009 | Admiral Refrigerators

1 Answer

Bottom not cold enough


did you remove the back freezer panel ? if not need to
is there a large anmount of frost on the coil behind the panel?
if there is thaw the coil with a hair dryer
if there is no frost on the coil you have a sealed system problem that will nee to be taken care of by a tech
if frost is on the coil you have a defrost heater defrost thermastat or defrost timer that is bad

May 17, 2008 | Kenmore 21.7 cu. ft. Top Mount...

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