Hello. The freezer keeps frosting over. I replaced the automatic defroster thermostat and it helped a little bit. The old part was rattling and this one is solid. Now it freezes over slower but still needs to be defrosted every few days. Do you have any ideas on where to go next? The model number is KSSS42QDW05 if that helps. Thanks for your valuable time! Also, is it normal for the fridge portion to get warmer if the freezer is not on? This causes a huge problem when I have to turn the freezer portion off to defrost it!
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Hello, That is going to be a problem with one of the components in the automatic defrost system. It is supposed to automatically defrost. Turning it off overnight to melt it will defiently help. If you are mechinacally inclined here is what to check.
DEFROST HEATER ...remove back wall of freezer and you will see a black heater at the bottom of the coil thats frosted up,it looks similar to the bake element in your oven,or in some cases it is going to be a spiraled wires inside of a glass tube. To check it,use a multimeter set to the lowest ohms of resistiance setting and follow and find the wires at the top of that frosted coil,unplug/disconnect those wires and check for continuty with around 5-20 ohms of resistiance. If it has that amount of ohms the heater is good. If your meter display does not change or displays OL the defrost heater is broke and needs to be replaced
DEFROST TERMINATION THERMOSTAT... it's round and has 2 wires and clips to the top of that frosted up coil. IT MUST BE CHECKED WHEN COLD SO BEST TO DO WHEN FROST IS STILL BUILT UP. To check it disconnect the wires on it and check for ZERO ohms of resistiance. As with the heater if the meter display OL or doesnt change,it is the problem
DEFROST CONTROL...it is hard to check for a semi unskilled person and if the heater or defrost t-stat check good its going to be the problem. It will NOT be in the freezer it could be on back wall or inside the control panel in the refrigerator section.
Check freezer fan is working. If mechanical fault,replace fan. If it's struck by frosting behind the freezer, defrost the fridge by unplug the unit. To keep automatic defrost in time, keep temp between 3 and 5 degree. Check timer, thermostat an defrost heater working properly. Turn counter clockwise thermostat, if fridge shuts off, it's o;k. And also check heater with 120 volts directly and working alright or with continuty check if closed it's working. Thanks.
The first thing you should be looking for is a frost or "snowy" build up on the back wall of the freezer. Assuming that there is a build up then you need to remove the back wall of the freezer. Gaining access to the defrost thermostat and defrost heater is a little difficult due to the frost build up. the defrost thermostat is attached to the evaporator coils to the right of the fan assembly. You need to check for continuity across the thermostat. The thermostat is the most likely cause.
If its a frost free upright freezer and the evaporator is frosting up with a snow like frost you have a defrost problem.. defrost thermostat, heaters, or trimmer
Dirty condenser coils are not the problem. It's most likely the defrost timer or defrost heater. The heater should come on about 3 times per day to melt the ice on the evaporator coils. If the defrost timer is not turning on the heater or the heater is burnt out, the coils will freeze up
Check rear wall of freezer by feel for frost. Heavy, even frost indicates likely problem in the defrost system. Unplug unit. Defrost heater (in freezer behind rear wall panel), defrost thermostat (same area-must be checked at freezer temperature) or Defrost timer-located lower back outside of unit. Near compressor. Do continuity test on heater and defrost thermostat and if they show continuity (good), replace defrost timer. If not, replace the one that tests bad.
Defrost coils fully. Reassemble.
Please let me know if I have helped with comments and rating.
Refrigerator will work about 7-10 days after being defrosted until thick frost builds up again cutting off air flow to both compartments
How to check
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.
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.
remove the back panel of the freezer and see if the evaporator is a block of ice (evaporator is something kind of like a radiator) if is a block of ice replace the defrost thermostat ( a little sensor whit tow wires) and the defrost timer ( usually next to the refrigerator thermostat inside the fridge side)
if there is frost build up on rear wall of freezer section the unit is not going through defrost cycle which builds up frost on evaporator and restricts cold air flow to the fresh food section. one of three things are bad. defrost heater, defrost thermostat or defrost timer. if no frost on rear wall you might be low of freon.
You have an issue with the defrost system, either the timer, thermostat or heating element. Probably the defrost timer refer to the manual to find it. If you don't have the manual check the makers web site for a parts breakdown. You should be able to put it into defrost manually by turning the knob and see if that helps. You may need to do this sevral times as it only stays in defrost for a little over twnety minutes and run cycle for 6,8 or ten hours. If the ice build up is heavy then twenty minutes may not do the trick thus the need for repated defrost cycles. If it does the trick replace the timer. If not check the thermostat and heater element.