Went for a maintenance call today for heat for two systems. All electrical components are passing for manufacture specifications for both systems. Did a combustion test is within range as well, inspected heat exchanger no cracks/leaks were detected for both systems. Checked temp split and is passing for specifications. Did notice blower wheel been collecting dust due to not have filter frequently replaced. Did replace filters for customer. Cleaned flame sensor and pressure switch hose. Both systems are up and running before departure. Thank you for choosing LBA services-Johann