2004 Honda Civic coolant leak
 

My honda civic had the radiator replaced and after a month with no issues it ran hot and all the coolant was gone from radiator and back up. Any ideas on what could be wrong and how to trouble shoot?

Possibility your thermostat stuck closed and engine overheated. Didn't your temp gauge indicate you were running hot? When you say all the coolant was gone, did you see it under the car or did it just disappear?
Duane