Samsung Fridge RF217/ABPN/XAA Continuous Running

[RickL]

Compressor is running continuously. Freezer temp indicator says "80" but temp is -17 or colder. Refrigerator compartment is colder than setpoint - probably due to colder freezer.

Action so far:

• cleaned very dirty coils
• Tested freezer thermistor both separately and in circuit - ohms appropriate for temperature
• Replaced freezer thermistor (had part) - no effect
• Replaced main board (only one board on this unit) - freezer and refrigerator compartments came into temperature and compressor cycled normally.
• 3 days later problem returned. Compressor now runs continuously once again and freezer temp display is 80.

Site did see a power glitch - short, long, long - before the problem first occurred. After I replaced the main board we saw one very short power glitch. This is nothing new at our site as we often seek power variation at around 8am each morning. Fridge is 7 years old.

Could something in the power circuit have failed? I didn't check the capacitor and haven't revisited the sensors or new main board output. Any thoughts appreciated.

[16345Ed]

I would test and probably replace all the thermistors. 

[RickL]

I have checked all the thermistors and they match the vendors temp/resistance data. I replaced the freezer thermistor anyway because I had the part. No change.

[16345Ed]

They can fail under load. 

Resistance test not definitive 

[RickL]

I replaced this thermistor. Are you saying that the replacement thermistor is also defective? Would an in-circuit test (voltage) be more definitive?

 

[RickL]

Just now, RickL said:

I replaced this thermistor. Are you saying that the replacement thermistor is also defective? Would an in-circuit test (voltage) be more definitive?

 

BTW: Thanks for your replies.

 

[darren412]

If you can swap out the main board for another one under warranty.  I would replace the board again.   The second power surge as you mentioned could have done it. If you don't already have one , which from the sounds of it, you probably already have a surge protector for your fridge.    But if you don't I would recommend  using a surge protector ( about 1,000 Jule) should be sufficient with a new replacement board  and also check  and make sure the power supply's polarity is correct also .    Nothing to really lose here if you can get the main control swapped out on a warranty issue.  Just my thoughts.   We can put a man on the moon but we cant make a fridge last 5 yrs without a problem.