Blue shield plan Fall tune up on 2023 system we installed this past April. Spoke with homeowner and system has been working well, but they are interested in better filtration. Explained the difference between different types of filtration vs air cleaning. After looking at pros and cons of disposable filters, washable filters and polarized air cleaners, homeowner decided to try a polarized media air cleaner. We will order a system and call to schedule an installation date when it comes in. Inspected hot water tank. It is from 2007, and I do not hear any sediment in it at this time. Checked heat exchangers, blower, evap coil and burners. Checked flame sensor, flue, return cavity and draft motor. Installed a fresh filter included with blue shield plan. Cycled system in heating and checked temp split, gas pressure, replaced gas cap, motor amps and micro on hsi. System is working well at this time!