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Our top mount Kenmore fridge (Model # 253.77872509) is frosting up in the freezer section. Have turned off & defrosted the freezer on several occasions - it works for a few weeks but then begins frosting up again.

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Hi,


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.


Please check the bellow links for your knowledge:-


http://www.wikihow.com/Stop-Your-Fridge-from-Ice-Build-up


http://www.ehow.com/how_4781069_prevent-frost-build-up-freezer.html


Please accept the solution if it's helpful. Do get back to us for any further query.

Thanks for contacting fixya.com

Posted on Sep 30, 2010

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Westinghouse freestyle fridge &freezer work but warm after being turned off fo 90 days


What happens in that 72 hours is the evaporator coil get's so much frost built up on it that the fan in the evap. freezer fan has no where to circulate the cold air (where the cold is produced). Basically you have a restriction between freez/fridg. sections you have defrost problem> It is one of three things d heater,d t stat, or your d timer.I need the model # to tell you what my sugestions would be and where to start.

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Refrigerator stopped cooling. As close as I can tell the fan in the freezer part was frosted up for a length of time and has possibly ruined the fridges cooling fan? Kenmore model 106 freezer on top.


If the fan in the freezer stops, then coll air from freezer will not pass from freezer section to fridge section.In that case, the freezer section will get over frosted but fridge section will not get cold, because cool air will not pass from freezer to fridge.The fan is there for two things, 1) for cooling the heating evaporator coil and 2) For flowing the cool air from freezer to fridge.---------- If the frost is getting collected and fan is getting stuck up in frost, then this is the problem.The defrost cycle is not running, the cooling cycle is running.---------------
This problem is called defrost problem.-------------

So first thing you try is , perform, manual defrost reset procedure.---------

The manual defrost reset procedure is as follows : ----
First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. Then check,if same frost is getting collected, then its defrost problem,. If it's again building up ice that means the unit is not defrosting. It's starting the cooling procedure, and then while defrosting, it's not working. The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from from online sites like: --- www.repairclinic.com or from searspartsdirect online site. --------- This should help.Thanks.Helpmech.

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1 Answer

Kenmore refrigerator Model 253-68232800 will not keep food cold in fridge and frost build up in freezer.


Top of Form

If there is no cooling at all on the fridge section but the freezer works then it is confirmed that the compressor and gas pressure is OK. Now shut off the fridge and leave it powered 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 in the freezer 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. Frost formation without defrosting could block the air flow and so shut the air passage to the fridge. Also the blower fan must work and if this is not working then the fan can be faulty. Also a fault on the control unit is a suspect to non functioning of any one of these components.
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 using a multi-meter on the defrost timer and the thermostat and make your observations so that we come to the solution.

Please check the link below for tips to remove the panels/parts:

http://www.espares.co.uk/advice/fridges-and-freezers/a/2

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1 Answer

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That could be the motor up in the freezer is not working or it could be a defrost problem. If you see frost on the back side of the freezer that is most likely a failed defrost circuit. If you cannot hear the fan motor or possibly a fan switch mounted in the door jamb. Sometimes the drain can stop p and water puddles between the top and fresh food bottom. Forms a slab of ice and blocks the cold air from getting to the fresh food section.

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Sounds like the defrost circuit of your fridge has failed. If you remove the back panel of the freezer compartment, you will see the evap coil encased with ice. Normally the defrost circuit will turn off the compressor and turn on a heater to warm the coil to about 45 degrees to melt any frost build up. After about 40 minutes the compressor will kick back in to keep your fridge cool again.

The typical failures are that the defrost heater burns out. If you have an older fridge, the defrost timer fails to advance, causing the fridge to stay in cooling or defrost mode.

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Hi,

Remove the access panel in the freezer section to expose the evaporator coils. If the coils in the freezer section get plugged up with frost, this frost will block the evaporator fan motor from blowing the cold air around. The fan blade can also hit this frost and either become noisy or stop altogether. Locating the defrost timer can be tricky....they are often hidden behind the back bottom corners of the fridge at the bottom, in the last few years the timers have been located in the ceiling of the fresh food section, and some behind the cold control cover. Once you locate the defrost timer, slowly turn the screw like wheel in the middle of the defrost timer with a straight screwdriver until the fridge shuts off. You are now in defrost. If the defrost heater(s) comes on now, replace the defrost timer and defrost thermostat. If the heater(s) does not come on, you can ohm test the defrost heater for continuity or volt test for 120 volts to the heater(s). If you have no power to the defrost heater(s) you can also bypass the defrost thermostat to see if the defrost heater will come on, join the 2 wires together to bypass the defrost thermostat. If the heater now comes on, replace the defrost timer and defrost thermostat. If the heater itself is bad, defrost the fridge with a hair dryer, replace the defrost heater* and defrost thermostat. If the defrost timer seems "hot" to the touch or is noisy ( like a ticking or screeching noise )...replace it.

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Look in the back of the freezer, there will probably be a metal panel with a plastic vent on top.

Look through the vents in the metal panel, and you should see the shiny metal fins of the evaporator. If the fins or the vents are plugged with frost, that is your problem. The freezer will stay cold because a small amount of cold air will be forced through the frost but that will not be enough to make it up to the refrigerator portion. You can defrost the unit by removing the metal panel and allowing the frost to melt. Careful use of a hairdryer can speed up this process. This will likely be a temporary fix. The root cause of excessive frost can be caused by a bad door seal or a defective defrost circuit.

First check that the door seal is good by closing the door on a dollar bill at several points around the door, both on the freezer and refidgerator door. If you can pull the bill out with no resistance, the door is not making a good seal. Inspect the seal and make sure there isn't anything stopping the door from closing such as food, or a shelf not pushed in all the way.

If the door seal is good, the defrost system is likely defective. The defrost system has three main parts, the defrost heater, thermostat, and timer. If either one of the parts fails, the freezer will plug up with frost every few weeks. If you can troubleshoot this by manually starting the defrost cycle. Let me know if you would like this procedure.

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1 Answer

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Ther are several things that can cause this, one a bad evaparator fan or an defrost problem. Look on the back of the freezer wall and see if there is a lot of frost. If there is then it's a defrost problem and the part most likely is a bad termination thermostat also known as a bi-metal. If there is not a lot of frost, check to see that you have air going to the refrigerator section. If not then it could be the fan.

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