I have a similar issue, my 2008 ford escape hybrid driver side remains on cold and my passenger side climate control works fine, no problems. I also notice that when I turn the knob on the driver side to heat, it does display on my dash that its changing the temp because it will say 90 degrees but doesn't change the temp. So I do believe its my driver side blend door actuator. Am I correct? and can I really replace it by only removing the glove department door?
That's exactly what I'd say the issue is ... most vehicles today have blend door actuators which are operated with an electric motor. These motors can go bad without regard to your comfort. In most cases the actuators are pretty easy to get to, though I don't know exactly where it's at with your specific vehicle. You will most likely find it on the driver's side of the vehicle. Engineers seem to place them where you can readily get to them. When you find it, you can try actuating it with a 12v source to see if it's working or not. It should look something like this: