Went for a tune up call today for heat. Tested for static pressure system is passing when in heat. All electrical components are passing for manufacture specifications. Blower motor is running but high. As well blower wheel is dusty causing for hit to work bit harder. Did a combustion test is within range. Inspected heat exchanger no cracks/leaks were detected. However did notice heat stress. Temp split is passing for specifications on furnace. Did replace filter for customer that was provided. Cleaned flame sensor and pressure switch hose. System is up and running before departure. Thank you for choosing LBA services-Johann