Complete 1 system furnace repair and preventative maintenance check. Renew Comfort Club membership. Find upstairs older system operating but in poor conditions due to a rusted heat exchanger and worn parts but customer rarely uses the system. Find downstairs heating not operating due to bird got into inducer assembly and block motor. Remove bird and clean assembly. Complete combustion calibration service on system. System operating at this time. Flue system rusted and not up to code. Add heat sealing around flue connector to help stop air leakage. Suggest upgrading flue system.