How to Test Samsung Refrigerator Thermistors 

+jeff arney Thanks for the Support and Thanks for Watching!

jimbola77 j Lorien Morgan

If you are referring to the defrost thermostat, I usually put it in a freezer for a few minutes or a glass of icewater. You should NOT get a reading at room temperature. If you are referring to the thermistor, disregard the above statement.

That thermistor is fine. Thermistors have a negative temperature coefficient. They are all rated at 25C. So a 5K ohm NTC thermistor will decrease in vaule if it is an NTC thermistor as it's temperature rises and conversely increase in resistance or it's temperature decreases. You do get PTC devices but they are less commonly used as far as I see.

Another input- I cannot see any frost/ice blocking the way of air from freezer to down below..

All the same

Have the same problem with same frig. Judging by what Bill said, i think its the frig temp. sensor thermistor. Did he respond to you?

Mine is the same way, but if you place the thermometer near where the fridge temp sensor is, then its probably pretty close to what the fridge says it is. At least mine is. So the issue with mine is that the sensor is near the bottom of the compartment. I have a "4 door" where there are 4 independent compartments, two doors and two drawers on the bottom. So in my fridge door the sensor is right above the crisper drawer at the bottom. So the bottom is the coolest of course since heat rises. The fan does blow air up to the higher levels, but it cuts out I guess when the sensor on the bottom says so. I can tell the fan works by holding in the light button so it thinks the door is closed, takes a minute to kick on. I intend to relocate the sensor, by cutting the wires and soldering in a couple feet of thicker lower gauge wire (lower resistance) since its likely calibrated to the existing wire gauge/length to the sensor. And then I may need to tape over the vents on the bottom if it gets too cold there, but I intend to set it at 40F, if I can actually get 40F all over. Then I don't mind the bottom being 37 or something like that. As it is, I set it to 36, and I get 43-45 everywhere but the back of the bottom shelf near the sensor.

www.searspartsdirect.com/product/1iuqhsxgu2-0046-401/id-da97-08310a

on the back of your fridge

That thermistor is fine. Thermistors have a negative temperature coefficient. They are all rated at 25C. So a 5K ohm NTC thermistor will decrease in vaule if it is an NTC thermistor as it's temperature rises and conversely increase in resistance or it's temperature decreases. You do get PTC devices but they are less commonly used as far as I see.

Return it and buy a different refrigerator. I can't even begin to tell you how much time and money I have spent trying to get mine to work correctly. Between paying "professionals" to come out, and swapping out parts myself- that is the best advise you could get. Don't believe me? Just google the model number.

OK, can you suggest a brand? I seem to be hearing that they are all the same--i.e., bad!

Buy a 5kohm NTC thermistor at any electronic spares supplier. They cost under 1 dollar. Solder it onto the wires and heatshrink wires individually and then heatshring it overall. That's it. Repair yourself for under a dollar. They are all rated at 25C temperature. Convert to F if you're American.