Zanussi ZNB 3850 Fridge/Freezer - Freezer too warm

[ViT]

Hi.

The past fortnight or so my freezer temp warning light and beeper goes off. The temp should be running at -20c but it has risen to -11c by the time the alarm goes off. I've noticed the problem most evenings but it could be happening while I am not at home too.

Does anyone know why this could be happening? And how would I go about fixing it?

Thanks for reading and thanks RE.com

Vit

[tonto33]

could have suffered a slight loss of gas

[ViT]

Thanks for your response.
How would I check the gas levels. Sorry for being so dumb on this subject.

[tonto33]

where bouts are you ?