Model Number: DV331AEWXAA01
Brand: Samsung
Age: 6-10 years
Greetings,
Looking for some ideas on this one if possible.
I have a samsung front loader dryer model number DV331AEWXAA01 that popped the thermal fuse. Verified the heater element was not shorted to the case and was not open, and verified the thermostat on the heater element case was not open. Verified the dryer vent hose was not blocked and had good exit air flow. Replaced the thermal fuse PN DC96-00887A, blew it again shortly after running the dryer. Then replaced the fuse again, replaced the thermostat PN DC47-00018A, and also replaced the heater element PN DC47-00019A even though I found no problem with the thermostat or element. I ran the dryer with the front cover off so I could watch the heater element cycle on and off, which it did, so it looks like the controls to cycle the heater element are working, but maybe not at the correct temperature? Reinstalled the front cover, popped the thermal fuse again after starting another load.
I tore down the dryer and removed the drum, front and rear drum seals look ok but not sure what worn ones would look like. I then removed the blower wheel for cleaning and verified the duct work from the blower to the rear of the dryer are clean and clear. Removed the thermistor from the blower wheel duct work, PN DC32-00007A, and measured 10200 ohms at room temperature. I then wiped it off in case there was lint on it, rechecked after that and read around 9500 ohms.
I think the dryer is running too hot but I am not sure why. I installed a jumper to jump out the high limit fuse for testing and the dryer just feels too hot. I have to get a temperature probe to check the dryer vent temperature, but I do have a new thermistor DC32-00007A on order.
Is there anywhere else I can look for an air blockage, like behind the rear cover? That is the only area I have not checked yet but since the dryer vent blows hard I and the blower wheel duct work is clear I figured there should be nothing back there. Any other seals to inspect? So far the ones I have touched look ok, drum seals, lint trap seals, front cover to bulkhead seal. Hoping there is a problem with the thermistor if this is used for cycling the heat on and off.