Question about Viking DFBB363L (20.3 cu. ft.) Refrigerator

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Ice build up on back of freezer on Viking DFBB363L

We have been told to do a forced defrost but the lights are still on and it sounds as though it is still running - have we done something wrong ?

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  • Viking Master
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You will need to replace the defrost thermostat on the coils located in the freezer.

Posted on Nov 02, 2012

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Posted on Jan 02, 2017

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SOURCE: Viking refrigerator with bottom freezer always running

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 In most newer models the timer has been replaced by an electronic control board.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.

Posted on Jul 05, 2009

  • 481 Answers

SOURCE: Viking freezer frost build-up

Sounds like a defrost problem. Check to see if there is any frost buildup in the back wall of the freezer. If so, it is not defrosting as it should.

  • possible causes:
  1. bad defrost timer/control board
  2. bad defrost heater (in freezer)
  3. bad thermo switch in freezer
If you don’t know what these are then unplug the machine and let the ice melt in the freezer overnight with the door open. Then try it the next day, if is cooling fine then you need to have a service person replace one of the above items.
  • if you already checked this and think it is a different problem then let me know, i will help you figure it out. 

Posted on Jul 21, 2008

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Amana ars2464bs quit working overnight. Freezer may have been left ajar, all night. The motor is hot and a clicking sound can be heard every couple of minutes. Frige and freezer room temp.

Unplug and manual defrost This happens when warm moist air is drawn into refrigerator. It freezes as frost and confuses the motherboard or defrost timer and put a heavy strain on compressor.. You also have a defrost timer inside the fresh food compartment. It is possible you can run forward to force defrost=> 67001036 Defrost Timer turn timer with small flathead screwdriver slowly clockwise.Click Here=> ARS2464B Amana Refrigerator Control Parts List Part 711 in top left photo can be found in the control panel inside the fresh food compartment. Try that and let me know if this helped, Thanks, Sea Breeze
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Sgt 48

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