While you wait for answers, we may have found some information which could help you.
Success
Message
Eureka 4870 vacuum?
eureka 4870B smartboss, upright vaccum?
Eureka Boss Smart Vac Thermal Cutoff ?
Eureka Model 4870 Motor Replacement?
need diragram for a Eureka The Boss Pro?
Older Eureka Boss Possilbe short?
how can I fix my Eureka 431?
how doi i repair eureka boss 4870 vacuum cleaner?
Vaccum, Eureka Model 6998 A?
Eureka "boss" #5893 stops sucking after 10mins?
How to fix idler clamp assembly (hardwood/carpet switch) on Eureka SmartVac?
How do I remove the canister motor 116.21514?