Bosch upright freezer only reaching -10

[Argentum66]

10year (at least) freezer has started to hover around the -10 temperature and not reaching the -18 set. I have checked the rear which seems quite clean, cannot find the condenser coils. The I can hear the freezer working and stops when the door is opened. There is a ‘super cool’ function and the freezer seems to work harder when this is pressed but the temperature does not alter. This started suddenly and was not a slow decline in performance. Any help welcomed. I’m reasonably handy so could undertake most repairs if possible.
Thanks in advance.

[electrofix]

whats the Enr number ? and FD number

Dave

[Argentum66]

Hi Dave.
ENR is GSU2320GB/52
FD is FD8012 000743

[electrofix]

by the look of it this is a self defrost unit

sometimes they get blocked with ice and the only answer is a total defrost

switch off , door open , 2 days

then see how it goes

Dave

[Argentum66]

Thanks Dave.
While waiting for a response I just had another look and think you have hit the nail on the head. There is a plastic vented plate in the inside of the freezer at the top which I couldn’t get off. I have applied a bit of force and managed to remove it and the whole space is full of ice.
Just have to find somewhere to put all the food now.

[Argentum66]

Finally managed to run the food in the freezer down and now defrosting. But once defrosted can I just power it back up? Will that have fixed the problem or will something need replacing? Why did this happen and how can I avoid in the future?
Thanks.

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