How cold is too cold?

[Deputy]

Stupid little wine fridge I bought (http://www.sylvaniaelectronics.ca/index/screen/products_3/model_ID/2473.html) is being a cow.<P>I set it to 15ºC or so and it just KEEPS GETTING COLDER. It's down to 10 and probably will keep going down. I tried setting it even higher, like 18, and that's not making any difference.<P>I know that about 13ºC is appropriate, and if I want the wine to age properly, is 10 too cold? I can still return it and I'm thinking I should if it's going to be like this...