hello good afternoon, I have a refrigerator mabe no frost that did not start, I tested the engine and this works well and also I found that there was no fear of the terminals of the engine so I changed the plate, this is small inside of the cabinet and has a potentiometer. to regulate the temperature. I placed it and started ten, but now it does not cut and the plate is new and without guarantee I can do, thanks

Hello Fernando 1309, maybe you changed the electronic card, but did not change the temperature sensor, or they did not sell it together, so, if the old sensor of your refrigerator is damaged, it could be causing the conflict, that It did not start before and now does not let the compressor make its corresponding stops. To check the sensor, mix hot and cold water, in a glass or glass vessel, to help with a thermometer, achieve that water reaches the glass, a constant temperature of +25 degrees Celsius, immerse the sensor in the water and passed about 3 minutes, also use a multimeter placed on the 20 kilo ohm scale to measure the sensor. The sensor at +25 degrees Celsius should have an approximate reading at 5 kilo ohms, to be considered in good condition, otherwise it would be the cause of all problems. Also, damage to the transistor or the relay that feeds the starter relay of the compressor, from the old electronic board, could have been the cause of the previous problem, when the compressor did not start with said old board. Now with the new electronic board, the possibility remains, besides it does bring a new temperature sensor. 1-) This may be damaged, 2-) Likewise the plate was purchased without guarantees, you may have been scammed and it also presents some type of problems, in its components, such as in the relay that feeds the compressor from said plate, that it is internally stuck in its contact plates, preventing the compressor from being stopped or cut off, 3-) It may also be that as in the video I am going to recommend you see, the processor, not It is sending the start signal to the transistor or relay, which feeds the defrosting resistor from the board and for this reason the compressor stays in its working cycle and the corresponding stops do not occur, to perform the defrosting of the refrigerator , which should turn out to be in normal working conditions, between 3 or 4 almost mandatory daily stops. Luck. S @ lu2 friovega63. https://www.youtube.com/watch?v=VQ96Sc5aIys https://www.youtube.com/watch?v=Osl1nuoIs3Y