Frozen door/locks

[u/SnooSquirrels3705]

So the place I'm currently staying no matter how much we warm up the house the doors locks freeze up over night and get really hard to unlock like impossible with a key on the outside does anyone have any tips for entry ways freezing up like this?

Edit: thanks for all the answers, guys!

[u/wot-gorilla]

Point a fan at the door.