Thanks, what should be the resistance in case of thermostat in series with the heater at room temperature? Mine, which is a Samsung inverter motor freezer top one, depicts 333 ohms. is it ok?
Thanks for watching. The thermostat is a switch which means it will either be closed and have continuity between 0 and 1 ohm (to let electricity pass through easily) or at room temperature the switch will be open and have no continuity and no reading on the multimeter (it will show - - - - - - - or something like OL on the display). If the thermostat is wired into the heating element then if you test both together then it should have a resistance between 20 and 100 ohms. if the thermostat has a resistance of 333 ohms at room temperature then it's faulty and should be replaced.
Thank you very much for the help. Just I dont know how to take the thermostat. It seems be pressed into the evaporator. All the 4 technicians, I have brought actually denied the existence of thermostat since the Ref has inverter motor. Now that I myself have opened it, i recognized the thermostat. It has temperature fluctuation in such a case that if i set it to 5F it goes down to -22F and after 7 hours of operating it the motor stops. Considering the 333 ohm reading and the explained issue, does it make sense that all the problem is due to the thermostat?
@@Maryjanewotson It is unusual for the thermostat to have a resistance like that so it is best to replace it. It would be worth checking the thermistors (temp sensor). The defrost thermost does not control the temperature of the fridge. We have a video "Refrigerator Too Cold Troubleshooting Guide" that explains this in more detail: ua-cam.com/video/sME40MR2VHc/v-deo.html
Thanks, I have already checked the board by an expert and it is healthy. About the sensors, all are good. Just the freezer temperature sensor is covered under a two layer Styrofoam which I couldnt open. I first measured its resistance and it depicted 5.4K ohms. Then I went to the balcony where is around 50F colder. The resistance didnt increase at the moment. Around 30 minutes later it was 6.8K ohms. This behaviour is different from the defrost healthy sensor that I have. In case of the defrost sensor, the resistance has increased as soon as I entered the balcony. However, I deduced that the delay in the freezer temperature sensor is due to the Styrofoam insulation, correct? BTW, the freezer fan has the resistance of 123K ohms( we have 220 Volts in here)
@@Maryjanewotson The styrofoam will provide some insulation but when it is consistently cold, but with the insulated sensor, it shouldn't take that long for it to change resistance but without a resistance chart or more specific info it is hard to say. If the control board and the other fridge sensor is fine, then it would be best to install a new freezer sensor and make sure that all the connections are secure. It is likely that the sensor is hardwired. If it isn't then try to make sure that the connection is good. Moisture can also interfere with the resistance if there are any exposed connections or terminals.
Great explanation! Thanks
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good video
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Thanks, what should be the resistance in case of thermostat in series with the heater at room temperature? Mine, which is a Samsung inverter motor freezer top one, depicts 333 ohms. is it ok?
Thanks for watching. The thermostat is a switch which means it will either be closed and have continuity between 0 and 1 ohm (to let electricity pass through easily) or at room temperature the switch will be open and have no continuity and no reading on the multimeter (it will show - - - - - - - or something like OL on the display). If the thermostat is wired into the heating element then if you test both together then it should have a resistance between 20 and 100 ohms.
if the thermostat has a resistance of 333 ohms at room temperature then it's faulty and should be replaced.
Thank you very much for the help. Just I dont know how to take the thermostat. It seems be pressed into the evaporator. All the 4 technicians, I have brought actually denied the existence of thermostat since the Ref has inverter motor. Now that I myself have opened it, i recognized the thermostat. It has temperature fluctuation in such a case that if i set it to 5F it goes down to -22F and after 7 hours of operating it the motor stops. Considering the 333 ohm reading and the explained issue, does it make sense that all the problem is due to the thermostat?
@@Maryjanewotson It is unusual for the thermostat to have a resistance like that so it is best to replace it. It would be worth checking the thermistors (temp sensor). The defrost thermost does not control the temperature of the fridge. We have a video "Refrigerator Too Cold Troubleshooting Guide" that explains this in more detail: ua-cam.com/video/sME40MR2VHc/v-deo.html
Thanks, I have already checked the board by an expert and it is healthy. About the sensors, all are good. Just the freezer temperature sensor is covered under a two layer Styrofoam which I couldnt open. I first measured its resistance and it depicted 5.4K ohms. Then I went to the balcony where is around 50F colder. The resistance didnt increase at the moment. Around 30 minutes later it was 6.8K ohms. This behaviour is different from the defrost healthy sensor that I have. In case of the defrost sensor, the resistance has increased as soon as I entered the balcony. However, I deduced that the delay in the freezer temperature sensor is due to the Styrofoam insulation, correct? BTW, the freezer fan has the resistance of 123K ohms( we have 220 Volts in here)
@@Maryjanewotson The styrofoam will provide some insulation but when it is consistently cold, but with the insulated sensor, it shouldn't take that long for it to change resistance but without a resistance chart or more specific info it is hard to say. If the control board and the other fridge sensor is fine, then it would be best to install a new freezer sensor and make sure that all the connections are secure. It is likely that the sensor is hardwired. If it isn't then try to make sure that the connection is good. Moisture can also interfere with the resistance if there are any exposed connections or terminals.