Solver dependency

Hi,

I'm currently doing a simulation that involves free convection and I've read everything I could find on this forum about the subject. Something important that comes out, is that the solver that should be used is the "fully coupled" one. My solution is however converging with a "segregated" solver, but not with this fully coupled one. My question is the following : Can I trust my results independently of the solver (seeing that when I refine the mesh, the results are pretty much the same) ?

Thank you for the help. Best regards,
Pascal