Performed furnace tune up Lincoln. 13 yr old Lennox split system attic with zoning. Access in laundry room upstairs. Found platform unit sits on dirty, cleaned off debris. Once platform was clear can see water marks on platform took picture. Tested system zoning, working for now. Tested system safety features. Unit is leaking air into the attic, loosing efficiency. Black flex ducts sealed and or taped. As I was testing the system and cycled it off, noticed the blower motor is making a rubbing noise as it slows down. Blower wheel and housing are running and housing has damage to it. See pictures. System was a time bomb. Could have failed at any time. Adjusted the squirrel cage so it doesn’t contact the housing anymore. Hot surface ignitor ok. Gas pressure ok. Cleaned burner and flame sensor Signed up for the annual membership This is an annual service program. Where you are pre paying for a year of service. It includes a furnace tune up, And ac tune up, As well as a plumbing inspec