Do dryer fires start when the dryer is off?

While the vast majority of residential clothes dryer fires ignite while the appliance is actively running and generating high operating heat, it is technically possible for a fire to smolder or start shortly after a cycle finishes. If a heavy accumulation of flammable lint inside the heating element box or exhaust duct reached extreme temperatures due to restricted airflow just before the cycle stopped, residual heat can cause that trapped lint to smolder and eventually catch fire after the motor shuts off. You can troubleshoot fire risks easily by inspecting your ventilation pathways. You can verify that your safety measures are effective when cleaning out all accumulated lint from the vent duct annually, washing the mesh lint screen regularly, and ensuring the outdoor vent flapper opens freely completely eliminates residual fire risks and keeps your home safe.