Good evening, I have a problem with a Samsung defrost refrigerator, it frosts in the evaporator and the whole system is covered and does not cool down. I changed the timer, the bimetal checked the resistance and it's okay it has two hot melts one on the right of the evaporator and another on the top of the evaporator one gives me continuity and the other does not, I don't remember which one but they are so I thank you for help promptly