Went for a maintenance call today for heat. Tested for static pressure system is passing when in heat. All electrical components are passing for manufacture specifications. Did a combustion test is within range. Inspected heat exchanger no cracks/leaks were detected. Checked temp split and is passing. Did replace filter for customer. Did notice blower wheel is collecting dust and recommend a cleaning.Cleaned flame sensor and pressure switch hose. System is up and running before departure. Thank you for choosing LBA services-Johann