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The defroster is staying on too long causing ice to melt

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Replace the defrost thermastat

Posted on May 06, 2008

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Why does the defrost cycle melt ice in ice maker bin and drips water down on food?


Check the door seals for tearing, it will cause an extended defrost cycle do to high humidity.

Jul 10, 2015 | GE Refrigerators

1 Answer

What is defrost overheat?


There is defrost heater which comes on in defrost cycle. defrost heater stays on certain time(lets say 15 min), but lets think it came on to defrost and melted all ice of the coils during 5 min, but we still have 10 more min design for heater to stay on. if heater will stay another 10 min it will warm up your stuff in the freezer, so everything will start to melt. to get around this, all freezers have limit thermostat(defrost thermostat), when that thermostat feels heat from heater, it will shut power off to the heater, so it still in defrost cycle, but heater will be off for another 10 min. When that thermostat get stuck in closed position(does not shut power to the heater when all ice melted out), you will have defrost overheat. so most likely that defrost thermostat needs to be replaced. here is the video how i replaced it on subzero pro series.

Apr 07, 2014 | Sub-Zero 650/SRH Stainless Steel

1 Answer

Ice forms as large block not in cubes


Defrost thermostat is bad. Defrost element is staying on for too long raising up temperature causing ice to melt.

Mar 26, 2014 | Fisher and Paykel Active Smart E522B...

1 Answer

Excess water dripping into refrigerator from freezer. I am in the process of defrosting. Ice build up behind freezer back wall. Do I need a new heater or will clearing the ice from drains suffice?


Hello,

Clearing the ice build up is a good start,the problem though is the drain pan under the coil in the freezer thats iced up is blocked so when the defrost heater comes on and melts the frost from that coil,it the water is collecting in the freezer and in many cases drips into the fresh food compartment,clearing the drain will resolve your leaking/ice build up issue.THE DEFROST HEATER IS GOOD melting the frost in the first place and hence forth that melted frost stays in the freezer and becomec ice.

Gene

Aug 09, 2011 | Roper RT16DKXK Top Freezer Refrigerator

1 Answer

Fan not working .water collecting in the fridge and build up of ice in both


The fan may have stopped working due to the build up of ice on the evaporator coil in the freezer. The most likely cause would either be a burnt out defrost heater or a bad defrost timer. Normally the defrost timer turns the heater on for about 30 minutes every 8 hours to melt the ice on the coil. If the timer fails it will either stay in cooling mode or defrost mode. The timer is usually located in the temperature control box in the refrigerator. It looks something like this:


slamfix_55.jpg On the side of the timer is a small cam that you can turn with a flat screwdriver. With the refrigerator plugged in, turn the cam until it clicks. When it clicks, it should be in defrost mode and the heater should start to get warm and melt the ice. You should be able to hear the ice crackling and hissing if the heater is working. If it does nothing then the problem is probally due to a burn out heater.

To get to the heater, you will need to remove the back panel from the freezer and the heater will be attached to the coil. You will need a hair dryer to melt the ice from the coil, to get to the heater. Parts can be found at your local appliance supply house or online at repairclinic.com. Hope this helps you.

Jun 30, 2011 | Frigidaire FRT21H8 Top Freezer...

1 Answer

Ice forming in the top freezer, leaks in the bottom refrigerator section


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.

May 27, 2011 | Kenmore 18.2 cu. ft. Top Freezer...

1 Answer

Stays in defrost too long. ice in the ice maker melt together. drips water inside the frezzer, changed the defrost thermostat & the mother board witch has the defrost timer in it. what is the ohms...


how is the food?is the ice cream getting soft? are you just having problems with the ice melting?you could have a bad water valve,water could be leaking past the valve,overflowing into the bin and will drip down,with the heater it's gonna work or not work when it should,there's a heater in the ice maker also

Mar 20, 2010 | Hotpoint HSS25GFP Side by Side...

1 Answer

The ice maker (GE Profile - 3 years old) produces ice and then, the next morning, the ice melts down into the rest of the freezer (i.e. the ice compartment is somehow not staying cold enough to sustain any...


If the unit is freezing well in the freezer and your ice bin is defrosting or ice is melting together it is your ice maker over filling the tray causing water to leak into the bin. You can purchase kits that contain all ice maker parts needed , it may be the ice maker and it may be the water inlet valve in the back , both come in the kit , go to sears parts on line with the model number from your unit.

Dec 30, 2008 | Refrigerators

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