Flashing SUPER and 3, Beeping – MIELE 4582 sded

[fkyriazid]

Hi!

My No-frost fridge freezer started to beep and flash the SUPER and 3 deg C, 3 days ago.

I did a thorough manual defrosting and the problem did not re-appear for 40 hours
Initially the dial was rotated clockwise to select a fridge temperature at 5 deg.

I also placed digital thermometers in the Freezer section and also below in the Fridge. While working ok, temperatures were -26 (freezer) and 3,5 (fridge).

Yesterday night

21:00 it started beeping the same error (SUPER and 3) and the temperatures were -16 (freezer) and 5 (fridge). The alarm sounded and right
after that the compressort started working, and after ~30 seconds the alarms stopped

21:50 new beepeing (same error), temperature readings were -20 (freezer) and 5 (fridge), the compressor was running, I just opened and closed the fridge door and it stopped

22:45 new beepeing (same error), temperature readings were -18 (freezer) and 5 (fridge), the compressor was running, could not get the alarm to stop

23:00 it started to beep continuosly while the compressor had stopped, temperature readings were -18 (freezer) and 5 (fridge) and by opening the freezer door I could hear like ice being melted on something really hot (I assume a defrost cycle started – although it is hard to believe that there was much ice build-up)

Today at 06:00 it was still beeping (obviously throughout the night also), temperature was much higher, -10 (freezer) and 8 (fridge) and the compressor was not running. I switched it off for 1 minute and then replugged-it. The compressor started and stopped almost instanlty and the beeping started again.

Any ideas what to look for? I have read in the forum about some Liebherr devices and the suggested remedy was a new evaporator temperature sensor, but to be honest I don’t know how this is connected… Any idea to measure somewhere with a polymeter? Any idea where to look for the evaporator temperature sensor? Is it in the fridge (behind the light panel) or freezer area?

Any help is greatly appreciated,

Regards

[Tony R]

Fridge evaporator sensor malfunctioning, need more info on model and index number to identify part number.

[fkyriazid]

Hi, thanks, MIELE KTN 4582 SD ed
Nr. 65/058091283
Index 21A
182

Can you advise on where the sensor is located? Fridge or Freezer area?
Also, since the device is ~15 years old and in the last 5 years I need to manually de-frost due to ice build-up, maybe there is somehing wrong with the de-frost system (thermostat or other)? Or the evaporator sensor is also related to this function?

Thanks again

[Tony R]

Fridge evaporator sensor 9590206 required, located behind cover at the end of the light housing and screwed to rear wall in a fixing, freezer drain icing up which can cause severe icing under the floor cover has no recommended fix, but I have in the past placed a heat sink wire around the finned rod heater and then down the drain and renewed foil tape in drain channel, not a fix for a novice due to the complexity in gaining access without damaging cooling pipes.

[fkyriazid]

Hi Tony, thanks! I have replaced the sensor and the beeping and flashing is gone!

But…. after starting the device again, it started to work (compressor) and everything started to cool down. I have placed digital thermometers in both sections, so I have checked and after 4-5 hours of continous running, the freezer showed -26 deg while the fridge was down to 0 deg Celcius… So I lowered the temperatrure switch (to higher temperature) and the compressor stopped… Unfortunately, now there are 4 hours gone and still the temperatures are rising (freezer -14 and fridge 8) and the device does not start…. Any indication on what could be wrong? It seems as the temperature does not enforce the system to start running again…. I even left the doors open for 3-4 minutes and still the compressor is not starting….

[Author]

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