Whenever my pipes freeze in the winter I usually close all my vents and turn the heat up and that usually fixes the problem (I burn with wood). Pipes only freeze if there is a strong north/north west wind with below zero temps, like last night. My vent closing trick is not working right now. I wave ...

Have you tried shutting all the vents in the house and turning the thermostat up? That's usually what I do and it fixes the problem.