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Ice building up in fridge

I have electrolux 7831I fridge. Ice (up t 2cm) is building up on the back panel inside even if the regulator is set to 1 (range is 0-6). When I defrost the fridge, the ice is back in 2 days. I suspect either defrost timer or thermostat faulty. According to my multimeter the temperature inside is around 8 degrees.

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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.
How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php 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 In most newer models the timer has been replaced by an electronic control board.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.


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.

Posted on Jul 12, 2009

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