The present paper deals with a numerical simulation of heat sources effects on temperature field inside a solid oxide fuel cell component. The temperature distribution is investigated using a co-flow planar SOFC comprising the air and fuel channel and two-ceramic electrodes, separated by an electrolyte. The Lattice Boltzmann Method is used for the numerical simulation of the physical problem. Once the numerical code is validated against published works, the effects of different geometrical and operating parameters such as, SOFC configuration, porosity, anode thermal conductivity, operating temperature and current density, on temperature distribution are discussed. It was found that temperature distribution is very sensitive to the inlet temperature, the current density and the thermal conductivity. Moreover, the electrode porosity has a smaller effect on cell temperature. Comparisons between three different cases of cell configuration indicate that the anode-supported is the best SOFC design. Published by Elsevier B.V.