Silver club furnace tune up on 2016 Carrier split system. Spoke with homeowner, and thermostat has been working great since last visit. They’ve had it set on auto and 72°. Check filter and replace 20 x 25 x 1 filter. Went in attic and inspected ductwork, inducer, motor, flu, evaporator coil, blower, heat exchanger. Clean flame sensor, clean burner crossovers. Checked surge protector, and cycled system on. Checked order of operation, gas pressure, replaced gas caps and temperature split. Checked blower amps and inducer amps. System is working well at this time!