Light Flickers with Clicking Sound

I have a Whirlpool refrigerator (model: GD5SHAXNBOO). The light in the freezer still works fine, but the light in the fridge flickers in time with a clicking noise coming from the bottom right of the fridge. It only does this when the door opens (and the sensor is not depressed; we can stop the flickering/clicking by pushing in the sensor manually). Any ideas?