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Re: Back of Fridge icing up
If the fan is running you more than likely have a defrost problem. look at the back wall of the freezer section if it is frosted up. it's not defrosting. There three components in this system. The defrost heater, the defrost termination stat., and the defrost timer. Newer refrigerators do not have a timer per say it is build into a electronic board usually mounted on the back of the refrigerator under a metal plate. The termination stat is the cheapest part @ $ 25.00. The heater should run @ 50.00 to 70.00. The board could be as much as 200.00 or more. If the refrigerator is over 10 years old you may wish to look into getting a replacement. Appliances are designed to start failing after 10 years old. My opinion. If you unplug the refrigerator let it defrost then plug it back in. it will work properly about 3 days before it frosts back up.
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here are lots of things that can cause cooling problems. One of the most common causes of poor cooling in a frost free refrigerator is a defrost system failure. In such a case one or the other compartment may appear to be keeping proper temperature but that too may change in a short period of time. The fridge compartment's temperature rise is usually (but not always) the first to be noticed. Frost" and "Ice"
There is a difference between "frost" (a white, snow-like substance) and "ice" (usually clear and solid). When referring to what is seen during an inspection, please keep this distinction in mind as the possible causes for each are often very different. The Defrost System
Inspecting the (usually rear) wall of the freezer compartment for a frost build up is necessary. (In the case of many GE top freezer models, check the freezer's bottom panel.) If there is a frost coating on it, it is often a sign of excessive frosting beneath it. Sometimes however the evaporator cover panel will actually need to be removed (see the illustration below) before an excessive frost build will visible.
The refrigeration system's evaporator (cooling) coil is usually in the freezer compartment. This evaporator will periodically frost over and have to be defrosted by means of a heating system. When the defrost heating system fails, the frost can accumulate to such a degree that airflow throughout the appliance is hampered. There may be just enough air circulation to cool the freezer section but that will eventually stop too.
This is what is happening. All "frost free" refrigerators are not truly frost free. The cooling comparment elements frost up with moisture from the air. Every 6 or 8 hours or so the fridge shuts down. then . small electric heaters fitted into these cooling elements melt the frost away. The water goes down a tube into what is called a drip pan mounted underneath the fridge. If the drain tube clogs with a piece of paper, or food or algae. The water from the frost melting stays in the pan because the drain is clogged. So each time the fridge defrosts, it builds up ICE not frost and eventually it completely clogs with a block of ice. The other thing that can happen, is that the timer that controls this cycle fails and the heating elements never turn on. The the fridge then clogs with frost. The fridge will clog with frost if any of the following parts fail. The defrost thermostat which opens up the heater circuit when the coils reach around 40-50 degrees, the defrost heaters mounted in the cooling coils, or the defrost timer fails. If your fridge works normally after this, then the drain hole was clogged and you unclogged it. If it gets colder and colder again. Then the timer, defrost thermostat, or the defrost heaters have failed. Hope this helps. You are welcome to write back to me and tell me what is happening with your fridge. I hope this helps, Best Regards, Mark
Normally when frost build up occurs it's because warmer outside air is getting into the freezer and the moisture from that warm air cools and condensates then freezes into frost or ice. You either have a bad seal like the other listing states try leveling the front a little higher than the back. Or you may have an issue with the defrost heater, thermostat or timer. Do you have a light that comes on from time to time? If so you have an auto defrost unit. If there is no light you may not have a frost free freezer which means you will have to remove the frost manually.
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Ice build up and stops the fans...
Check out these tips...they can help you figure out whats going wrong with your
refrigerator and why it is not cooling
I have this problem as well, only nobody is leaving anything open. The defroster is defective of these things and the duct between the fridge and freezer gets frozen over and the cold air can't get in the fridge, so the freezer keeps working until it's blue in the face.
If freezer is icing up, 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