Question about Liebherr KGBN 3846 Premium BioFresh Bottom Freezer Refrigerator

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My liebherr fridge freezer cun 3033 had a door changed yesterday, since then the fridge and freezer both work well, but the alarm for the fridge doesn't stop sounding. When it does stop after 15 minutes the light stays off when the door is opened. It seems to me that the fridge thinks the door is open all the time even when its not

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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woodchuck789
  • 4066 Answers

SOURCE: the freezer keeps defrosting

The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.

If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.

If the defrost thermostat is bad it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.

The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.

If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. 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 because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others.

Posted on Oct 20, 2009

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  • 3 Answers

SOURCE: Too much bleeping

The alarm is caused by either temperature disorder, check on your thermostat settings, or it is being caused by unbalanced level of freon gas in the system, or the door of the freezer does not shut correctly.

Thanks

Nikunj Pattni
nikunj@qool-point.co.kr

Posted on Nov 17, 2008

  • 1 Answer

SOURCE: liebherr frost free fridge/freezer

Try these solutions in these order:
1. Switch off the fridge and leave the door open overnight. Switch it back on in the morning.
Explanation: The sensor inside the fridge gets frozen and cannot control the temperature properly.
2. Switch off the fridge. Unplug it. At the back of the fridge (behind the unit, not inside) there is a large grid. Clean it with a hoover thoroughly. Open the fridge. Dry the back of the fridge if wet (inside the fridge). If frosted wait for it to defrost and then dry it. Plug in the fridge. Switch the fridge back on. This one worked for me.
Explanation: The dust in the grid deprives the fridge from cooling down and the unit can't control the temperature in the fridge section.
3. Switch off the fridge. -Unplug it. Empty it. Turn it upside down. Plug it in. Switch it on for 24 hours. Switch it off. Unplug, return to normal and switch on.
Explanation: This has to do with the pressure of the gas inside the compressor. I have not tried it but this advice as given to me by a qualified electrician when I commented the (in)famous F2 problem in Liebherr fridge/freezers.
Hope it helps. Regards. Albert

Posted on Jan 04, 2009

  • 93 Answers

SOURCE: alarm won't stop beeping

Door left open or temp is too warm. most I found is heavy ice build up on freezer evaporator, very easy to tell, pull out one of the drawer and look on the back wall, it should not have any ice on it (a little frost is OK). It may be bad Evaporator sensor, Evaporator fan motor is not running, door evaporator fan reed switch installed upside down,bad connection on defrost heater connector, bad defrost heater element, open heater HI limit switch, open gap on door gasket and compressor never stop running. If no ice build up and compressor is running but temp is rising then it may be sealed system problem. Good Luck.

Posted on Mar 01, 2010

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Is the fan running inside the freezer? To see that you have to remove the back panel of the freezer. Also how much stuff are you putting into the freezer please make sure you are not blocking the vents inside the freezer. Also when you remove that back panel ensure the vent tubes to the fridge area are not blocked.

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Hello,
Normally if you remove the LHS salad drawer in the fridge you will see a sticker on the wall of the unit with the relevant information.

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Alarm won't stop beeping


Door left open or temp is too warm. most I found is heavy ice build up on freezer evaporator, very easy to tell, pull out one of the drawer and look on the back wall, it should not have any ice on it (a little frost is OK). It may be bad Evaporator sensor, Evaporator fan motor is not running, door evaporator fan reed switch installed upside down,bad connection on defrost heater connector, bad defrost heater element, open heater HI limit switch, open gap on door gasket and compressor never stop running. If no ice build up and compressor is running but temp is rising then it may be sealed system problem. Good Luck.

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1 Answer

Fan not working, temperature too cold


You may need a man. Mine was doing the same, The sensor repair kit costs £35 the labour £60, both plus vat, so that was £109.25 in 2009.

Repair men seem thin on the ground and therefore his traveling time may add up. I believe, repair men pay for a course, and then charge like a wounded bull as they are the only ones that can do anything necessary

Apr 22, 2009 | Liebherr K3660-20 Refrigerator

1 Answer

Too much bleeping


The alarm is caused by either temperature disorder, check on your thermostat settings, or it is being caused by unbalanced level of freon gas in the system, or the door of the freezer does not shut correctly.

Thanks

Nikunj Pattni
nikunj@qool-point.co.kr

Nov 17, 2008 | Liebherr Refrigerators

1 Answer

Liebherr frost free fridge/freezer


Try these solutions in these order:
1. Switch off the fridge and leave the door open overnight. Switch it back on in the morning.
Explanation: The sensor inside the fridge gets frozen and cannot control the temperature properly.
2. Switch off the fridge. Unplug it. At the back of the fridge (behind the unit, not inside) there is a large grid. Clean it with a hoover thoroughly. Open the fridge. Dry the back of the fridge if wet (inside the fridge). If frosted wait for it to defrost and then dry it. Plug in the fridge. Switch the fridge back on. This one worked for me.
Explanation: The dust in the grid deprives the fridge from cooling down and the unit can't control the temperature in the fridge section.
3. Switch off the fridge. -Unplug it. Empty it. Turn it upside down. Plug it in. Switch it on for 24 hours. Switch it off. Unplug, return to normal and switch on.
Explanation: This has to do with the pressure of the gas inside the compressor. I have not tried it but this advice as given to me by a qualified electrician when I commented the (in)famous F2 problem in Liebherr fridge/freezers.
Hope it helps. Regards. Albert

Sep 07, 2008 | Liebherr KGBN 3846 Premium BioFresh Bottom...

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