Furnace maintenance and safety inspection. Reset two furnaces to factory specifications. Checked motors, relays, capacitors, contractors, circuit boards, pressure switches, bearings, fuses, wiring and connections, seals, fan, gas valve voltage and pressure, ignitor, flame sensor, thermostat, and heat exchanger. Cleaned out drain trap and all hoses and drain line. Replaced air filter. Replaced humidifier pad using a (35). Cycled both furnaces a few times. Furnaces are working safely at this time. Customer is a VIP Service Plan member.