A couple of days ago i went for fuel. Unlocked filler door. But now it wont lock closed again.could this be a broken fuse. If so can someone tell me how to locate the fuse as ive looked up online but cant find location.

 

model and year?

Fuses should be listed in the owners manual. here's a link to the online copies

https://www.volvocars.com/us/own/own...owners-manuals

Did you look to see if the clip or another part is broken or if something is binding in the door?