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Sensor dry problem with samsung dv328agw

8 posts in this topic

Hello.  Bought a used dryer and trying to troubleshoot sensor dry mode.  Timed mode works fine.  Dryer seems to run forever in sensor mode.  When time remaining shows several minutes left a lot of time gets added to the cycle (maybe an hour?).  I cleaned the sensor bar with rubbing alcohol and tried to remove it to test the resistance but the connectors seemed to be on really tight.  Using temp+signal test mode with an empty drum, the numbers just count from 0 to around 2400.  Sometimes the display stops at zero for a minute but then starts counting seeming out of control again.  Any thoughts?  bad mainboard?

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Assuming your exhaust vent is free and clear and unit is not displaying fault codes tS or od I would check resistance of thermistor and sensor bars at the main pcb.  To test thermistor, disconnect CN6 plug and test pins 2 and 6 on harness.  10k ohms at room temp should be ok.  To test sensor bars disconnect plug and test pin 4 (pink) to pin 5 (orange).  Resistance should 0 without laundry and 190 ohms with wet clothes.  Make sure lint screen is clear.  Could still be a bad main pcb with no fault codes and these components test good.

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Thanks for the advice and test points. First, I checked the vent. Took out a few handfuls of lint, but didn't seem too bad. Second, ran normal sensor cycle with empty drum. Unit shut off in 3 min like it is supposed to. Very interesting. I will test with laundry in a few days and figure out if I need to go further with the troubleshooting. Maybe it had too much backpressure.

One thing I did notice is the drum seems to be warped out of round making some noise when spinning. Is this common? I didn't even think to look at it before buying the machine.

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It is normal for drums to be out of round. I wouldn't worry about that, sounds like you have a bad main board. I had worked on a Samsung dryer with the same symptoms, main board fixed it

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Thanks again for all the help.  I am going to test further now that the vent is cleaner.  I am borrowing a linteater from a friend to get it as clean as possible.

 

I am wondering why a new board would fix this.  The hardware that is used to measure the impedance of the sensor bars is unlikely to fail.  Does samsung offer its technicians a way to update the software on these control boards or just replace them to get the latest software?  Of course, the hardware could get revised over time too.  By the way, this machine has version U100.

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  Does samsung offer its technicians a way to update the software on these control boards 

 

I know LG just came out with this ability and I'm sure Samsung is close by.  But it's only for authorized servicers.  Until then, you have to replace the board to get the latest updates.  The good news is that Samsung parts are cheap, cheap, cheap!  As a company, they have a philosophical problem with making a profit on parts.  

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The good news is that Samsung parts are cheap, cheap, cheap!  As a company, they have a philosophical problem with making a profit on parts.  

 

 

I often wonder how long they will continue with this philosophy. Don't get me wrong, I love it but  for a company, it just aint natural.

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