/diy/ - Do It Yourself

So I don't know shit about plumbing but I've been having a problem where I'm constantly getting heat from my perimeter heaters when my heat is turned off. I live in a condominium complex with a central boiler system, and I was told that I probably have a zone valve issue and that they're usually easy fixes. So I did a little bit of research on how to repair/replace them but everything is on what to do when you have no heat, not when you have too much.

It's not clear to me if there is anything wrong with the valve because I can hear the motor go on an off and the little lever seems to respond as expected. With that said is it even possible that my problem could be related to the motor? Otherwise how feasible of a inexperienced diy fix would I be looking at?