We find small black marks on the laundry at the completion of the drying cycle. The black marks can be removed with soap and water. Prior to each load of laundry we remove and clean the lint filter and wipe down the entire dryer drum with a damp cloth. When wiping around the felt drum gaskets with a damp cloth we get similar black marks seen on the laundry. No matter how many times we wipe around the drum gasket, we are unable to completely get rid of the black residue. Some black marks show up on items in every load of laundry. We have inspected the clothes out of the washer to make sure the washer was not leaving the black marks. Thank you.
Is the residue coming from the back or front of the drum? Most dryers are equipped with 2 drum roller supports in the rear under the drum. You may have a drum roller that is going bad and some of the rubber residue is getting past the drum seal. Some dryers are quipped with an additional pair of drum rollers under the front of the drum as well. I would check all the drum rollers to see if they are all in good shape. A definite symptom of a bad drum roller is finding black residue along the outside of the drum where the rollers ride. You will have to open the dryer cabinet to see the outside of the drum. Also, check the rear drum seal to make sure it is not crimped or folded inwards in the drum. The felt seal in the back should should ride evenly all the way around the drum and should not be that visible inside the drum itself. That is, you may see some of the seal, but you shouldn't see part of it folded inside the drum or bits of it tattered or torn. I hope this makes sense to you. Let me know if this helps.
I had this problem also. My repairman replaced the drum and rollers two times over the course of a year. When the marks came back a third time I finally got a replacement dryer from LG. Just had the replacement installed and the installer said the problem is caused by using dryer sheets. He said the ozone system in the dryer breaks down the chemicals in the dryer sheets. Doesn't really explain why the problem seems to be fixed then reappears
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We have had this problem for quite sometime. The first time the repair guy came out and just wiped out the dryer, then he came back 3 months later and replaced the complete drum. Now 9 months later we started seeing the 1-2" marks again.
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