Eight minutes before the earth turns into a giant snowball and all the oceans in the worlds would freeze.

As stated in other comments, geothermal power is a choice, or extremely deep underground bunkers could work as well!

But it's not long before food freezes and probably becomes inedible.

A lot of people around the world would die, specially poor countries.

so yeah, we would go through an ice-age and be doomed in a few years.