Samsung dv33 dryer would not heat
Harley D. • Jacksonville, FL • September 20, 2014
Appliance: Samsung Dryer DV331AER/XAA-0000
My Repair & Advice
The dryer would not dry well, and would heat inconsistently (no trouble code displayed). The trouble shooting guide for the dryer said problem would be heater (the heater tested OK) or thermistor. The spec sheet said the thermistor should be 10,000 ohms at 77 degrees Fahrenheit. When I took the thermistor out it read 8,500 ohms at 71 degrees (the temperature in my house). I looked up the specs for a similar rated thermistor and calculated it should read around 11,500 ohms at 71 degrees. When the new thermistor arrived and sat in my house for a couple of hours it read 11,383 ohms, just like I calculated it should. I then tested the old one again and it now read 9,500 ohms. Installed the new thermistor and the dryer then worked perfectly.
I believe if the thermistor was reading zero ohms or infinity ohms the computer would have seen a problem and displayed the code for the thermistor. The problem was the thermistor was staying close enough to the normal resistance range the computer never saw a problem.
BTW, the instructions I found online for removing the thermistor involved removing the drum, etc. to get to it. Not so. I removed the heater assembly and reached around behind the tube assembly to reach the thermistor. It did help to have an inspection camera, but a mirror would have worked (like in the old days).
BTW, APP is great. Ordered the part Tuesday night and had it by Thursday afternoon. Just like when I ordered a part for the dishwasher a few months back.
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