Why is my Bosch tumble dryer making screeching noise? Overloading the dryer can strain certain components, causing a screeching sound while it’s in motion. Troubleshoot a Bosch dryer making loud noise and solve the problem by finding the source of the sound. We’ll show you how to troubleshoot a Bosch dryer making rattling noise, humming sounds, thumping, squeaking, and grinding noises.