  Temperature dependencies of excess conductivity, Sigma', have been studied in
detail for three FeSe_{0.94} textured polycrystalline samples prepared by
partial melting and solid state reaction. It was revealed that both Sigma' and
its temperature dependence are extremely sensitive to the method of sample
preparation. Then, it was shown that in the range from the superconducting
transition temperature Tc ~ 9 K up to the characteristic temperature T_01 ~ 19
K, Sigma'(T) obeys the classical fluctuation theories of Aslamazov-Larkin (AL)
and Hikami-Larkin (Maki-Thompson (MT) term) pointing to the existence of
fluctuating Cooper pairs in FeSe at temperatures exceeding double Tc. Like in
cuprates, AL-MT crossover at T_0 < T_{01} is observed, which means the
appearance of 3D-2D dimensional transition at this temperature. This allows us
to determine the coherence length along the c-axis, Xi_c(0) ~ 3 A, and a set of
additional samples' parameters, including the phase relaxation time, Tau_{Phi},
of fluctuating Cooper pairs, within a simple two-dimensional free-carrier
picture. It was shown that Tau_{Phi} in FeSe coincides with that found for
YBa2Cu3O7 suggesting that the nature of superconducting fluctuations is very
similar for these high-temperature superconductors of different types.
