Maybe it's the air chuck. Try filling your rear to see if it works. Sometimes the airchuck "thingy" that pushes the valve stem "thingy" gets stuck and won't do nuttin'.Thank you! Upon further inspection my front tire is definitely low.
I went to go check the pressure and fill, but it seems like the valve stem doesn’t want to let air in or out. Do I need to replace the whole thing? I’ll start with replacing the core tomorrow.