Nonlocal electron heat transport in magnetized dense plasmas is studied numerically using a nonlinear Fokker-Planck (FP) model with self-consistent electric fields. The nonlocal effect in electron heat transport is evaluated by comparison with the effective mean free path and the scale length of the temperature gradient. The dependence of the nonlocal electron heat transport on the effective mean free path is shown in this study. Under a very strong magnetic field, the effective electron mean free path becomes shorter than the scale length of the temperature gradient and the results of the FP and linear models agree well. Under a very strong magnetic field, the electron distribution is described by the Maxwell-Boltzmann distribution.