Tech arrived to perform home care maintenance on one system in home. System is approximately 7 years old located in utility closet for entire home. Customer reports no issues at this time. Inspected system.noticed drain line went from 3/4 to 1/2 before going to washer/dryer connection. Noticed inadequate water safeties on system. Noticed dirty indoor blower assembly. Noticed single wall flue pipe connected to water heater. Tested heating operations, no issues. Flushed drain line and verified safety. Changed filter 16x25x1. Checked cooling. Inspected outdoor unit. Unit in good condition and fully operational. No issues outside at the moment. Brought recommendations for customer. Customer initially wanted to clean blower wheel and add SS1 safety to system, water is off to complex at time of visit and blower wheel cleaning could not be done, did not charge for today. Went with SS1 installation only. Installed SS1 water safety and tied in with wet switch. Verified safeties. System is ope