Thermal properties and thermal events in lithium-diphenyl carbazide complex (LiDPC) are studied here by thermogravimetric analysis (TGA) and thermomechanical analysis (TMA). TGA showed a weight loss 4.1 % while TMA showed a slow shrinkage at 77 oC, changes to a fast shrinkage above 80 oC with a shrinkage coefficient 47.3 μm/oC. The shrinkage phenomenon in LiDPC is found to be time dependent. The activation energy for the isothermal process is calculated and found to be 0.39 eV. A set of SEM photos of LiDPC complex, could be recorded and supported what is obtained by X-ray diffraction patterns. Studying of I-V characteristics of lithium diphenyl carbazide (LiDPC) polycrystalline layers of thickness ranged from 150 to 1000 µm and the critical voltage (VC) and breakdown voltage (Vb) are evaluated. Experimental evidence for the existence of Joule heating in LiDPC thin solid samples has been found. Heating effect of LiDPC samples shows a clear change in their electric current behavior near TC = 60 oC.