A high-pitched squealing or screeching sound coming from a residential clothes dryer during operation is typically caused by severe friction from worn-out rubber drum support rollers, a dry or misaligned idler pulley, a slipping drive belt, or friction against the felt drum seals. Over years of heavy use, the lubrication inside the roller bearings dries up, causing metal-on-metal or plastic-on-metal grinding that translates into an irritating, high-frequency squeak. You can troubleshoot noise sources easily by spinning the drum by hand with the power off. You can verify that your corrective action is successful when disassembling the cabinet, lubricating the roller shafts with high-temperature grease, or replacing worn support rollers and idler pulleys eliminates the squeaking sound entirely and restores quiet operation.
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