Replaced evaporator sensor but still icing up

[ScottieDawg]

Liehberr CNes 366

No-frost fridge is icing up on the back wall and blocking up the drainage hole.

No F2 error but did replace the evaporator sensor and things look to have improved marginally but still icing up.

No longer hear the cracking sounds as it defrosted itself when it was new.

What’s the next thing to check/replace?

Thanks

[ScottieDawg]

Re: Replaced evaporator sensor but still icing up

*bump*

No thoughts anyone?

Defrost cycle definitely happening, droplets on the back wall.

Just leaves the question of why the iced up drainage hole…?

[ELDAR59]

Re: Replaced evaporator sensor but still icing up

hello, iced up drain hole on a liebherr appliance is rare as the drain pipe is external, therefore not at risk of coming into contact with internal pipework and freezing.
is it just blocked or definitely frozen?
are you sure you replaced the correct sensor? the evaporator one is the one that sits flush with the back wall of the fridge.
if you replaced the air sensor then the problem will obviously still be evident.
the main cause of iced up drain hole would be a temperature problem. has anything else in the fridge frozen? dairy produce, salads etc.

[ScottieDawg]

Re: Replaced evaporator sensor but still icing up

Thanks Alf.

Here’s a picture of what we’re dealing with:

http://postimage.org/image/ty78c4shh/

Definitely replaced the evaporator sensor.
Don’t believe the drainage tube is blocked as when I last deiced with hot water, it all flowed freely down the hole.

Seems to me the droplets are coming down the back wall and freezing on the drip channel. Perhaps I need to check the fridge for level…

[ELDAR59]

Re: Replaced evaporator sensor but still icing up

ok, the only way you’d get that happening is either a temperature fault, but then you’d surely notice other things in the fridge freezing too, or some sort of physical fault with the evaporator or insulation.
there’s no way that the contents of your evaporator tray should ice up.
what part number was the evap sensor?

[admin]

Re: Replaced evaporator sensor but still icing up

Hi

This unit could ice up the drain hole dependent on age if the insulation has failed.There is a kit that another manufacturer uses if the drain on yours (if i remember correctly) goes through the insulation and then comes out at the bottom.

Bryan

[Tony R]

Re: Replaced evaporator sensor but still icing up

Hi, r600a is on the right track here with insulation failure, the pipe work from the freezer runs up to the fridge in this area, when the insulation breaks down ice can form in the drain channel and sometimes on the wall behind the right hand salad drawer, unless someone is prepared to cut ou the foam and lag the pipes and replace the foam insulation no repair possible.
Tony.

[Author]

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