18 R1, GPU fan not working properly?

I have been noticing for a while that my 7-year-old laptop has been getting hotter than I feel it should be while playing games. I just finished the Witcher 3 not long ago, playing on medium/high graphics, with good frames, and my computer got quite hot, but nothing I didn't expect with that game. I just recently started playing Rage which is much older and less graphically intense but the laptop has been just as hot or even more so than when playing the Witcher 3. I suspect the GPU fan may be the issue but I cannot tell for sure so I could just be worrying for no reason. However, I have noticed that the main GPU fan does not seem to be doing a great job. The CPU fan is constantly pumping a steady stream of air out of the exhaust grills but the GPU fan produces significantly less flow, thus my reasoning for believing it is not working as it should. I expect my computer to be able to keep up with the temperature change but I can't even recall the last time the fan peaked to louder than a whisper. Even the cooling fan deck I keep under the laptop is way louder. In short, I do not know for sure, but suspect my fan is not working properly. How can I check to be sure? Is it likely to be a mechanical or software issue? What can I do if it is not working properly? Is a fan controller program recommended? If yes, which is the best one? Any help/advice is appreciated since I really don't want to burn out my laptop. Also I am kind of a noob when I comes to computers so lay it on me easy.