Stuck front temperature knob??

Hi everyone, I've had my 2015 Mazda3 for a few months now and so far I like it a lot. Unfortunately I've run into a problem; as the title says, the temperature knob on the front panel (the left most knob of the fan control row) is stuck all the way to the left, to where the fan is stuck on cold. That's not so bad with the upcoming weather, but then we aren't quite out of winter time yet, so I figured I should try to do something about it. I noticed just this past Saturday, and upon looking on youtube it seems to be a stuck cable (?), but the car in that video was of a different make and model so I can only assume. Is it easy to pop that front faceplate off so that I can take a look? Has anyone had this issue, and if so, have you successfully corrected it on your own? I'd appreciate any advice or help.