The effect of Fe and Co doping on structural, electrical and thermal properties of half doped La0.5Ce0.5Mn1-x(Fe, Co)(x)O-3 is investigated. The structure of these crystallizes in to orthorhombically distorted perovskite structure. The electrical resistivity of La0.5Ce0.5MnO3 exhibits metal-semiconductor transition (T-MS at similar to 225 K). However, La0.5Ce0.5Mn1-xTMxO3 (TM = Fe, Co: 0.0 <= x <= 0.1) manganites show semiconducting behavior. The thermopower measurements infer hole as charge carriers and electron-magnon as well spin wave fluctuation mechanism are effective at low temperature domain and SPC model fits the observed data at high temperature. The magnetic susceptibility measurement confirms a transition from paramagnetic to ferromagnetic phase. The observed peaks in the specific heat measurements, shifts to lower temperatures and becomes progressively broader with doping of transition metals on Mn-site. The thermal conductivity is measured in the temperature range of 10-350 K with a magnitude in between 10 and 80 mW/cm K. (C) 2013 Elsevier Ltd. All rights reserved.