Spare parts for a Bosch 500 series dryer can be purchased from online retailers, including Sears, AppliancePartsPros.com and the Repair Clinic website, as of 2015. Amazon.com carries a replacement lint screen that fits several models of Bosch dryers.
Sometimes a broken dryer needs one or more parts replaced for it to function normally again. Parts that are commonly replaced include dryer door handles, thermostats, light bulbs and door hatches. More complex repairs might require parts such as belt drums, heating elements or temperature regulators. A broken dryer door can be completely restored with a door seal, door frame and glass door window.
Common dryer problems that often require replacement parts include worn out bearings, belts and thermostats. Loud or uncommon noise coming from the dryer is a strong indication that a seal or belt is worn out. If a dryer fails to start, it could be due to a bad heating element or cycling thermostat. In some cases, the dryer starts but produces no heat. The culprit is usually a blown fuse or malfunctioning heating element. When a dryer fails to tumble normally check for a defective belt or switch. Sometimes a rare problem causes dryers to malfunction. For example, the timer on the dryer can stop advancing due to a broken timer motor.