Load balancing is a well known problem, which has been extensively addressed in parallel algorithmic. However, there subsist some contexts in which the existing algorithms cannot be used. One of these contexts is the case of dynamic networks where the links between the different elements are intermittent. We propose in this paper an efficient algorithm, based on asynchronous diffusion, to perform load balancing in such a context. A convergence theorem is proposed and proved. Finally, experimental results performed in the SimGrid environment confirm the efficiency of our algorithm.