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DFSB423 Viking How do you defrost

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DFRB364R Viking is freezing up

this unit is operated by a main control board. need to pull all shelves and pull rear panel and test with multi meter the heater and defrost thermostat. if both are good replace board.

Dec 16, 2015 | Viking Refrigerators

2 Answers

How to adjust door viking dfsb423

Viking 42" built-in units usually don't offer any door adjustments. If one of the doors are not closing well, check for obstructions blocking the door bins, worn door gasket, and possible door warp-age on the panel ready models. Viking did have top hinge recalls updating to the new "Cobra" hinge on many of their models which can be verified by calling viking and providing your full model/serial numbers. If your Fridge door is lower than the freezer door you most likely have a worn door closer located on the lower hinge of the fridge door, the closer is a 2 piece plastic interlocking/mating unit which wears down over time from friction. This usually needs to be replaced. Pleazer Appliance...

May 06, 2014 | Viking DFSB423 Side by Side Refrigerator

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Defrost heater do not defrost creating poor air circulation

for starter call viking with your mod and ser #
there is a hinge recall on fridge door is covered by warranty regardless of age
it can cause the air channel from freezer to fridge to ice over due to too much humidity entering fridge
this stops cooling in fridge
the viking warranty starts from the day you took possession
defrost heater almost never
sounds like you need a better servicer
ask viking for other auth servicer in your area

Apr 07, 2017 | Viking DFBB363L (20.3 cu. ft.)...

1 Answer

Appears to be the condensation leaking into freezer bottom and leaking all over the floor. Drain has been thawed but leaking continues. Local dealer advised to get a fix kit from viking, but I have no...

Drain troth kit with clasp to fix defrost drain port and to program board for conventional defrost to 4 hrs run time. Viking parts dist has that available 8004889868

Aug 26, 2011 | Viking VCBB363L Bottom Freezer...

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Frost Buildup in freezer section

check the defrost heater in the evaporator compartment at the rear of the freezer for continuity,then check your defrost control if the heater is o.k. be it either an adaptive defrost or a timer type defrost control

May 23, 2010 | Viking Professional VCBB363 Bottom Freezer...

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Our freezer started defrosting. Sounds like the motor is still running but everything is melting in the freezer. The fridge compartment is working well. How should we troubleshoot?

Make sure all the fans and compressor is operating. If one is not then this is the problem...All fans must work inside and outside. If after you have verified this is not the problem UNPLUG THE UNIT and look at the freezer rear lower wall. You are looking for frost. If you find frost you will need to shut it off and open it up for 24 hours. Unscrew the lights so they don't stay on. The next day you are going to need to remove that panel with the frost on it to access the coils and defrost any remaining frost. Clipped onto the coils is a disc shaped object about the diameter of a quarter with 2 wires coming out of it. This is the defrost thermostat. If you have a meter you can verify that this part is good by allowing it to get very cold..(frosty) and then see if you can read through the 2 wires..get a reading cold its good,,,no reading cold,,,its bad. At the bottom of the coils is the defrost heater,,,look at it good if it looks ok then take the meter and see if you can get a reading through that. Same as the defrost thermostat except it does not need to be cold. Get a ohm reading its good. The last part is the defrost timer. I do not know where it is located on your unit it could be anywhere but I do know this. If the other 2 parts are good and you did have a lot of frost on your coils then this is the bad part. You will need to locate it and replace it.

May 22, 2010 | Viking DFSB423 Side by Side Refrigerator

1 Answer

Viking DSB483D: freezer at +10F for 4 hours or more

check the evaporator coil for leakage.

Nov 13, 2009 | Viking DFSB483D

1 Answer

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.

Jul 05, 2009 | Viking VCBB363L Bottom Freezer...

1 Answer


The defrost timer is most likely stopped on defrost mode,the refrigerator is trying to cool but cannot bring the temp down because of the defrost being on all the time.replace the defrost timer.If I can help,let me know.

Oct 20, 2008 | Viking 42 in Built In Professional...

1 Answer

Viking beeping

do you notice alot of ice builup on the freezer back wall? if so you need to defrost it and more than likely replace the defrost terminator. make sure you remove the back panel and use boiling hot water to remove the ice( i normally use a coffee cup) part # 10442407 ONLY USE VIKING PARTS) others may tell you to use whirlpool or some other but DON'T

Mar 29, 2008 | Viking DDBB363 Bottom Freezer Refrigerator

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