Performed annual heating maintenance el dorado hills. 18 yr old split Goodman system attic. Black flex ducts sealed. System has smart vent. Cleaned burners and flame sensor. Hot surface ignitor replaced, blower capacitor replaced. Tested system safety features working at this time. System testing well at this time, client don’t use system very much, pellet stove. 20-30-1 filter disposable, due to be changed soon. Might want to look into washable filter. So you don’t have to buy another one. System is older but working for now. Eventually might want to look into replacement, due to age.