Black Friday furnace tune up special, customer gets a free Summer tune up with today’s furnace tune up. Spoke with customer and at this time, the summer tune up is scheduled for June 24, 2021. Asked about filters and changed customer supplied 14x24 and 16x25 filters and customer purchased a 14x14 filter from us. Asked how home has been heating and cooling and it is doing well. Went in attic and checked ductwork, flue and insulation. Attic insulation from where I can see looks to be a bit low, but home is being renovated. Ductwork is hanging a little loose , but is connected well. Checked furnace blower, blower capacitor, inducer and burners. Blower capacitor is reading low but still in range at 4.8 / 5.0 mfd. Cleaned flame sensor. Adjusted and reset loose wiring and hoses. Checked drain line and plenums. Cycled system on heat and adjusted gas pressure, it was set to 5.7 - adjusted to 3.54 w.c. Replaced gas caps. Checked amps and electrical. Measured heat rise and delta t. System is h