Is there currently a Stack Exchange site where I can ask about household appliances?
In the current case, my question is whether it's good practice to turn off a fridge when you don't need it, and if yes, in what intervals.
Is there a site (or proposal) where this question would fit in? It's not Food and Cooking, and it's probably not Home Improvement, either...
There is not currently a household appliance Stack Exchange site.
The latest list of sites can be found here: Area 51
If you want an appliance site, support it here: Area 51: Home Appliances
which seems like plenty to go ahead and post a question like that there. Yes, there are today 368 questions about refrigerators.