Clicking/cracking noise while seated My initial suspicion was that the clicking/cracking noise my bike makes was coming from my bottom bracket. But today, I noticed that when applying full power while standing up, no clicks are present.

When I am not standing, my center of mass obviously goes to the back of the bike. Therefore, I suspect the problem comes either from the back part of the frame (closer to what I hear) or the rear wheel (less probable in my opinion).

My frame/rear wheel have a warranty of 2 years, so I would really like to know if the noise comes from the frame or the wheel. Is there a way to diagnose such a thing? Removing the bottom bracket and inspecting the interior of the frame would be worth?

The only way to rule out a wheel issue would be to get another wheel to test?
The noise was coming from the seat post. Removing the dirt, reapplying some grease and re-tightening the clamp solved the problem. I have also identified that the seat clamp is kind of broken, and the saddle was not leveled. 

Thanks for the comments, I didn't know that noises coming from the seat post were that common.