Question about Refrigerators
Ice build up in bottom freezer compartment
Posted by Anonymous on
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Posted on Jan 02, 2017
remove back panel inside freezer. you will see drain tray at bottom with a drain hole in the middle - this is blocked usually with ice. melt off with a hairdryer and follow up with hot water till water flows away freely
Posted on Sep 25, 2008
SOURCE: MY MAYTAG REFRIGERATOR
remove back panel inside freezer and there is a tray at the bottom with a drain hole in the middle. this is blocked with ice. melt off with a hairdryer and follow up with hot water till it flows waay freely
Posted on Oct 02, 2008
During the defrost cycle heaters in the wall of the freezer are turned on to melt the frost build up. This melted frost "water" is supposed to run out a drain in the bottom of the freezer and collect in a pan under the refrigerator/freezer where it will eventually evaporate. If this drain is blocked it will cause a lot of water to collect in the bottom of the freezer and that water will eventually turn back into ice. I recommend defrosting the freezer manually, removing all the ice/water buildup in the bottom, and trying to unplug the drain line to the pan underneath. Also check the seal on the freezer door. If it's not sealing well it could be letting a lot of moisture enter the freezer which would lead to more frost buildup and more water during the defrost cycle.
Posted on May 22, 2009
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.
If the ice is on the floor of the freezer
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.
If the ice is on the back of the freezer
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 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.
Posted on Oct 13, 2009
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