Hi Emilio the procedure is simple, you can be guided by the images I show you as an example. Do not forget that the bridge between start and run (R and S) is only momentary until the compressor starts, then you must remove it, because it can damage the winding of the compressor itself. If you still have doubts, please comment. Luck. S @ lu2 friovega63. Hi Emilio, we can know the differences between thermal and bimetal fuse, just by first knowing what are the basic functions of each of them. For example, the thermal fuse, as the name implies, is a protection element for defrosting resistance and, in particular, to protect the defrosting system and the equipment itself, from any error of the control elements, which may prolong in excess, the work or operation of the defrost resistance, for example any refrigerator with the No Frost freezing system. That is, for example, if the bimetal or defrost sensor fails in a defrost system of a No Frost refrigerator, before the equipment is damaged by melting its parts, burning, or even causing a large fire in the home, the The resistance itself when exceeding the temperature for which the thermal fuse is designed causes said fuse to act instantly by basically opening the electrical power circuit to the resistor, which is why said fuse must always be connected in series with the resistor itself. On the other hand, the bimetal in equipment with an analog or electronic system or the defrost sensor in electronic systems, are control elements, because they control the necessary operating times of the defrost resistance in refrigerators with No Frost system, which obviously need to be periods, make a programmed defrosting, to avoid large accumulations of frost or ice in the evaporator coils of these equipment, which prevents them from lowering the required cold temperature in them. So also the bimetal, will always be connected in series with the defrost resistance, to close or open the circuit, but not as protection against high temperatures, but as control of those high or even low temperatures. Summarizing one protects and the other controls, therein lies the difference. Luck. S @ lu2 friovega63.