Liebherr Fridge Freezer Not Cold Enough -2 to -10 at most

Good you are back in working order, it could still be a defrost heater circuit fault, if so the ice will build up again over time.
Sounds like you checked out the heater ok, did you check out that thermal fuse ?
These days the timer is usually part of the micro-processor software in the front panel but it could still be a connector somewhere.
Don't forget a lot of these white goods have exactly the same technology across many manufacturers and for some it's only the name on the front that changes (e.g. Hoover, Hotpoint, Indesit etc).
I also chose a Liebherr (CN4313) as it has a twin compressor arrangement rather than an air channel from the freezer to the fridge that I felt was the problem with my previous FFsers, so far after several years touch wood no problems! Anyway I can understand a bad experience put's you off.
Do you have space for two ? I am fortunate to have a small chest freezer in the garage that's handy (when not full) as a backup, so if you want to buy another and you have some space why not keep the old one as a backup.
Good luck :)
 
As a first-time poster I hope it's OK to add to this thread to expand on the info supplied, for anyone researching the issue. Thanks to the previous posters.

The thread was helpful in fixing our Leibherr CN 4313. Temperatures in fridge and freezer were at least 10˚ higher than shown on the display. 2cm of frost on the back of the freezer. In 4 years we've several times left the doors slightly open for hours - too small a gap to trigger the alarm (an arguable design flaw).

I left the fridge door shut and used a heated hairdryer on the rear of the freezer compartment, on the recessed upper area and the gaps beneath the "nose" of the protruding lower area, blasting it for a minute at a time until a steady trickle of melt water flowed from the "nose" gaps *. The shallow trough at the bottom needed emptying every few minutes (a large sponge worked well). After a couple of hours water also began dripping from the small rubber teat above the condensation tray on the compressor. To avoid overfilling the tray I placed a cut-down plastic ice cream container on top of it and checked the level now and again **. It filled quite slowly. Around 500ml drained from the rear and 4-5l from the front. Once the rear dripping had stopped for 15 minutes I assumed the defrosting was complete. The process took 6 hours. All working fine now.

* I advise being careful not to overheat the freezer compartment. Distribute the heat evenly and err on the side of caution.

** Forgetting to remove this before switching would haved posed a fire hazard.
 
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