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Kenore freezer running constantly

Freezer has been running constantly, I bought a new defrost timer. It still runs. Everything I have read says to get ice off the coils. How do I get the back off? There are no screws. There is also no water in the pan. So I am assuming that the line might be blocked.

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  • babybear Sep 21, 2007

    It' a frost free freezer. Kenmore 253 9280212

  • babybear Sep 21, 2007

    I did get the back off and there was no ice so it is still running. I had to take the insides apart to get to them. Any ideas now what to try.

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Need a model #.. is this a frost free freezer or a refrigerator ?

Posted on Sep 20, 2007

  • Mike Johnson
    Mike Johnson Sep 21, 2007

    should of been a light layer of frost on all the tubes from top to bottom of cooling coils when u had the back off. Not ice but FROST.

    Check freezer...
    for Frost build up and if Fan is blowing,

    Check condenser...
    To make sure clean, and the fan is blowing by compressor.... IF no condenser coils on back

    Check Recirclating Vents in Freezer... to make sure theres no blockage,
    If you frosting up on the evap. cooling coils.. ur heater or defrost therostate needs replaceing.. u said alread replaced d. timmmer

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This kind of Food Service Commercial grade freezers have many product protections against excesive heat from a defrost subsystem failure, these protections include a defrost precision timer and/or a digital pcb (control board) composed by many electronic ic's and components.

A common failure is on the relay contcts that energizes the compressor and in many cases the relay nergizes a contactor to energize the compressor if one or this two (Relay and Contactor fails (keep contacting stacked or not released) the compressor continues running with no cut except when by ovrheated ands the overheat protections disconect the compressor until the temperature lowes to safe working temperature locating the trouble on the relay or contactor. But in some cases the control board fails at circuit level and not cut by temperature or defrost program then the control board could be the responsible.

Narciso González Palomera

Posted on Jan 27, 2009

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How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

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.

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.

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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
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.

How to check everything
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