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Ice and frost on coils inside freezer - Microwave Ovens

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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.

Posted on Sep 27, 2010

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Posted on Jan 02, 2017

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My refrigerator will not get cold the freezer gets cold it also has frost on the back panel in the freezer


You have a problem with the defrost circuit of your refrigerator. The frost is building up on the evaporator coils in the freezer preventing air circulation from the refrigerator to be cooled off by the coils. It is made up of three parts, the defrost timer/control module, defrost heater, and thermostat.

The way it works is that normally the compressor has power for 8- 24 hours, then the timer/module cuts power off and sends power to the defrost heater for about 45 minutes. The heater is attached to the coil and warms up the coil to melt the ice. When the coil reaches about 40 deg F, the thermostat which is in series with the heater, opens up cutting off power to the heater. This prevents the freezer from getting too hot. After the 45 minutes are up, the timer/module switches the power back to the compressor again to restart the cooling cycle.

I don't know what make and model fridge you have since you did not supply it. But if you have an older model it is controlled by a timer, often it fails to advance to the defrost mode causing it to stay in cool mode. Often the problem is that the defrost heater burns out so it can't melt the frost on the coils.

If you take the panel off the back of the freezer you will find the evap coil. You can use a hair dryer to melt the ice. The heater will be attached to the coil. If you have a meter you can check whether it is burned out. Replacement parts can be found at your local appliance repair outlet or online at repairclinic.com.

Mar 23, 2011 | Microwave Ovens

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My Panasonic refrigerator NR-B420T is not cooling, however the freezer part still cooling.


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Since there is cooling on the freezer the fault can be the defrost timer. So shut off the fridge and leave it off while you clean and check the evaporator for frost. If frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.
However if Ice forms then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test from the outside and make your observations so that we come to the solution.

Jan 05, 2011 | Panasonic Microwave Ovens

1 Answer

Well everything is defrosting, when i was trying to figure it out, I noticed that the back wall of the freezer was frosting up. I removed the bottom pan and of the visible vents I could see there is ice in...


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Sorry to hear about your problem.

Sounds like you have a defrost issue. Hence your unit is not defrosting. All of this apply's if your freezer side has ice on it. If not. you have other issues, this does sound funny, but this is why your refrigerator side is warm, or not cooling.

Here is a list of some things that can go wrong.
1. Defective heat coil
2. Defective defrost timer
3. Defective defrost sensor
4. Defective Fan


You should call a service company to resolve your issue.

Since I tried to help you, Please help me and Rate/Vote on the response. Thanks

Jan 02, 2011 | Microwave Ovens

1 Answer

Ice forming in my frost free whirlpool fridge


There are a few reasons why this is happening. One and usually the most common is the the heater for the coils in the freezer is not working.These heaters are controled by a timer that lets it run for a while and then shut off, this keeps the coils from freezing up and collecting moisture. 9 out of 10 times it is the timer mechanism that goes bad and it is a reletivly cheap and easy repair. Also make sure the gasket on the freezer is in good shape and not allowing outside moisture in where it can condense and freeze along the wall of your freezer, keeping the door open too long will also create this effect, but if the heater is working correctly it usually will take care of itself. You may also want to make sure there is good air flow from the unit itself and blowing good cold air around in the freezer.

Nov 16, 2010 | Microwave Ovens

1 Answer

My freezer side GE Profile Performance refrigerator collects water at the bottom and freezes. I have to dig out and cclean the ice every 2-3 days. I turned off the water line , but it still does it. what...


The 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 back of the freezer.

Aug 25, 2010 | Microwave Ovens

1 Answer

AMANA UPRIGHT FREEZER LEAKS WATER FROM THE DOOR


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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.

Jan 14, 2010 | KitchenAid Architect II KBHS109SSS...

2 Answers

Always finding water on the floor under the fridge


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 06, 2009 | Microwave Ovens

1 Answer

My refrigerator stopped working and will not come back on. It is a Jenn-Air Side by side purchased 4 years ago.


you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 24, 2009 | Microwave Ovens

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