Karl, some freezers say they need to be in the house, as it is too cold outside (say in a garage) for them to work properly.
The last freezer I bough was a Beko because it said it would work in a garage or other outside room.
The Which web site says:
In practice, lots of people keep freezers in their garages for years without experiencing any problems.
However, because most of these appliances aren’t designed to work properly in cold temperatures (see exception below), we can’t recommend putting them in unheated rooms.
If you do decide to keep your freezer in your garage, it’s worth bearing in mind that this might invalidate its warranty - so check the small print first.