Check out more troubleshooting issues at Eureka_1660SP_Troubleshooting
Eureka manufactures three models of The Boss® 3-in-1 that are different only by their color. If you have an orange vacuum, you have The Boss® 3-in-1 166OSP. If your device is purple, you have The Boss® 3-in-1 166PPL and if it is red, you own The Boss® 3-in-1 166RSD.
This repair guide is for The Boss® 3-in-1 166OSP.