Printing below 0 celcius

Hi, is there a way to change the minimum temperature check to below 0C?
My printer sits in my garage wich is heated only when i work in there and it gets pretty cold outside around there, was under -30 this morning so when i tried to start a print this morning at the same time i builded a fire, the bed and hotend were at -8 and i could’nt get them to heat. Gave me an mintemp maxtemp error…
So i went to my config file and changed the
temperature_control.hotend.min_temp 0 that was was disabled enabled it and put it to -20 so see what it would do
i also added a
temperature_control.bed.min_temp -20 since nothing of the kind were for the bed.

Sadly it did not change anything.

Ayone know if there is a way around that? Other than to use an external preheat device, wich I would find quite a pity since there is quite more than enough heating power in my printer, but well, if it get the job done, I’ll just have to make sure no one sees me doing it.

By the way, I wish you all an happy new year!

Imported from wikidot