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. Did a combustion test is within range. Inspected heat exchanger no cracks/leaks were detected. Checked temp split and is passing for specifications. Did replace filter for customer. Cleaned flame sensor and pressure switch hose. Tightened all connections on system few wires were loose. Checked humidifier and water is starting to corroded recommend replacing the filter. Customer approved and installed.System is up and running before departure. Thank you for choosing LBA services-Johann