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The entire evaporator coil is frozen and heaters will not come on. Mark Edens

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The common failures is the heater itself goes bad, or the defrost timer fails if you have an older model. Check the heater and defrost thermostat with an ohmmeter to see if it has opened up or burned out. If you have an older refrigerator, check the defrost timer operation. Often the timer motor does not advance and it will stay in compressor operation and never turn on the defrost heater. Turning the cam until it clicks should turn the heater on and run the heater for about 30-45 minutes. If it does not turn on the compressor after an hour, then you should have the timer replaced.

Posted on Sep 27, 2010

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First the refrigerator portion lost cooling but the freezer was fine over time the freezer esentially turned into a refrigerator. It is no longer making ice or keeping things frozen, but is about as cool...


the evaporator coil is frozen over and cant release cold air due to this,defrost the unit remove rear panel inside freezer and troubleshoot the defrost heater and thermostat and also make sure the fan near this coil is running, on the evaporator coil as,you cant blow cold air thru a coil covered by ice

Jul 02, 2011 | Jenn-Air JSD2789GES Side by Side...

1 Answer

Refridgerator (upper) does not cool. The freezer (lower) works well. I noticed the evaporator coils (can see partially through bottom freezer) were frozen. Drain pan is dry. Vacuumed the condenser coill...


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.

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.

May 31, 2011 | Refrigerators

1 Answer

The evaporator coil is frozen. can i take off the cover and defrost it?what are the possible causes?


If the entire coil is frozen you can defrost it and it will work for 2-3 days but eventually you will be back at square one. You have a defrost problem and you should replace what is broken. I don't know what you have but it could be the heater, terminator, defrost timer or board, and thermister.

Dec 24, 2010 | Kenmore 53542 / 53544 Side by Side...

1 Answer

The freezer fills with water and overflows about once a week.The food is partially frozen and the ice is clear and wet. The fridge is cold and no problems but the freezer doesn't fully freeze and water...


your evaporator coil in the rear area behind the freezer back panel is frozen over with ice and the coil can no longer deliver cold air due to ice blocking the air flow from the evaporator fan,remove this rear panel,defrost it with a hair dryer,check the defrost heating coil for continuity,they go bad regularly,if not the heater coil under the evaporator coil,it may be the defrost timer in the refrigerator section of the unit that powers the defrost coil that needs replacement

Jul 25, 2010 | GE 22.3 Cu. Ft. Bottom-Mount Refrigerator...

1 Answer

Water on floor freezer side front left facing, could be frozen defrost line, where is it?


I think you are right.
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.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the lower back of the freezer

Nov 17, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

FRIGIDAIRE frost free refrigerator seems to be leaking. Items in freezer are frozen...items in refrigerator are cold...any ideas? It has an ice maker which is working. Approx. 13 years old.


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.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the lower back of the freezer.

Oct 28, 2009 | Refrigerators

1 Answer

Water has accumulated and has frozen in the bottom of my freezer.


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.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the lower back of the freezer.

Oct 16, 2009 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

1 Answer

Refrigerator has water on the bottom all the time, the freezer has frozen ice on the bottom


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.


Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the lower back of the freezer.

Aug 27, 2009 | Kenmore 20.6 cu. ft. Top Freezer...

1 Answer

Frozen water covers the floor of my freezer


Something less serious I think. 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.

Your drain tube may be stopped up with ice at the upper end because it drains too slow because it's stopped up at the lower end in the evaporator pan under the unit at the floor. It can get dust and mold in it. Once you get the ice out at the top a little pressure with a turkey baster will usually clear it out. Flushing it out with hot water and clorox may help.
Make sure it drains quick enough to prevent refreezing. . The drain should be located below the evaporator coils on the lower back of the freezer.

Aug 14, 2009 | Refrigerators

1 Answer

Icemaker stopped making ice. water dispenser is working. switch is on. ice purchased at store stays frozen


hi..
You will need to unplug refrigerator and remove the rear panel in back of the freezer. Look to see if the evaporator coils are frozen over and if yes defrost with a hair dryer. Look at the bottom of the evaporator and you will see a defrost heater. Some have a glass tube on outside. Look to see if the heater is burned out..

thank u
rate me

Jul 21, 2009 | KitchenAid Refrigerators

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